diff --git a/src/files/WorldFiles.cpp b/src/files/WorldFiles.cpp
index c09d6b90..f1c9291a 100644
--- a/src/files/WorldFiles.cpp
+++ b/src/files/WorldFiles.cpp
@@ -2,6 +2,7 @@
 
 #include "files.h"
 #include "rle.h"
+#include "binary_io.h"
 #include "../window/Camera.h"
 #include "../objects/Player.h"
 #include "../physics/Hitbox.h"
@@ -23,6 +24,8 @@
 #define PLAYER_FLAG_FLIGHT 0x1
 #define PLAYER_FLAG_NOCLIP 0x2
 
+#define WORLD_SECTION_MAIN 1
+
 using glm::ivec2;
 using glm::vec3;
 using std::ios;
@@ -40,14 +43,6 @@ void int2Bytes(int value, ubyte* dest, size_t offset){
 	dest[offset+3] = (char) (value >> 0 & 255);
 }
 
-void floatToBytes(float fvalue, ubyte* dest, size_t offset){
-	uint32_t value = *((uint32_t*)&fvalue);
-	dest[offset] = (char) (value >> 24 & 255);
-	dest[offset+1] = (char) (value >> 16 & 255);
-	dest[offset+2] = (char) (value >> 8 & 255);
-	dest[offset+3] = (char) (value >> 0 & 255);
-}
-
 float bytes2Float(ubyte* src, uint offset){
 	uint32_t value = ((src[offset] << 24) |
 					  (src[offset+1] << 16) |
@@ -56,7 +51,7 @@ float bytes2Float(ubyte* src, uint offset){
 	return *(float*)(&value);
 }
 
-WorldFiles::WorldFiles(path directory, size_t mainBufferCapacity, bool generatorTestMode) 
+WorldFiles::WorldFiles(path directory, bool generatorTestMode) 
 	: directory(directory), generatorTestMode(generatorTestMode) {
 	compressionBuffer = new ubyte[CHUNK_DATA_LEN * 2];
 }
@@ -115,14 +110,18 @@ void WorldFiles::put(Chunk* chunk){
 	region.compressedSizes[chunk_index] = compressedSize;
 }
 
-path WorldFiles::getRegionFile(int x, int y) {
+path WorldFiles::getRegionFile(int x, int y) const {
 	return directory/path(std::to_string(x) + "_" + std::to_string(y) + ".bin");
 }
 
-path WorldFiles::getPlayerFile() {
+path WorldFiles::getPlayerFile() const {
 	return directory/path("player.bin");
 }
 
+path WorldFiles::getWorldFile() const {
+	return directory/path("world.bin");
+}
+
 ubyte* WorldFiles::getChunk(int x, int y){
 	int regionX = floordiv(x, REGION_SIZE);
 	int regionY = floordiv(y, REGION_SIZE);
@@ -199,10 +198,11 @@ ubyte* WorldFiles::readChunkData(int x, int y, uint32_t& length){
 	return data;
 }
 
-void WorldFiles::write(){
+void WorldFiles::write(const WorldInfo info){
 	if (!std::filesystem::is_directory(directory)) {
 		std::filesystem::create_directories(directory);
 	}
+	writeWorldInfo(info);
 	if (generatorTestMode)
 		return;
 	for (auto it = regions.begin(); it != regions.end(); it++){
@@ -213,26 +213,58 @@ void WorldFiles::write(){
 	}
 }
 
-void WorldFiles::writePlayer(Player* player){
-	ubyte dst[1+3*4 + 1+2*4 + 1+1];
+void WorldFiles::writeWorldInfo(const WorldInfo& info) {
+	BinaryWriter out;
+	out.putCStr(WORLD_FORMAT_MAGIC);
+	out.put(WORLD_FORMAT_VERSION);
+	out.put(WORLD_SECTION_MAIN);
 
+	out.putInt64(info.seed);
+	out.put(info.name);
+
+	files::write_bytes(getWorldFile(), (const char*)out.data(), out.size());
+}
+
+bool WorldFiles::readWorldInfo(WorldInfo& info) {
+	size_t length = 0;
+	ubyte* data = (ubyte*)files::read_bytes(getPlayerFile(), length);
+	if (data == nullptr){
+		std::cerr << "could not to read world.bin (ignored)" << std::endl;
+		return false;
+	}
+	BinaryReader inp(data, length);
+	inp.checkMagic(WORLD_FORMAT_MAGIC, length);
+	/*ubyte version = */inp.get();
+	while (inp.hasNext()) {
+		ubyte section = inp.get();
+		switch (section) {
+		case WORLD_SECTION_MAIN:
+			info.seed = inp.getInt64();
+			info.name = inp.getString();
+			break;
+		}
+	}
+	return false;
+}
+
+void WorldFiles::writePlayer(Player* player){
 	vec3 position = player->hitbox->position;
 
-	size_t offset = 0;
-	dst[offset++] = SECTION_POSITION;
-	floatToBytes(position.x, dst, offset); offset += 4;
-	floatToBytes(position.y, dst, offset); offset += 4;
-	floatToBytes(position.z, dst, offset); offset += 4;
+	BinaryWriter out;
+	out.put(SECTION_POSITION);
+	out.putFloat32(position.x);
+	out.putFloat32(position.y);
+	out.putFloat32(position.z);
 
-	dst[offset++] = SECTION_ROTATION;
-	floatToBytes(player->camX, dst, offset); offset += 4;
-	floatToBytes(player->camY, dst, offset); offset += 4;
+	out.put(SECTION_ROTATION);
+	out.putFloat32(player->camX);
+	out.putFloat32(player->camY);
 
-	dst[offset++] = SECTION_FLAGS;
-	dst[offset++] = player->flight * PLAYER_FLAG_FLIGHT |
-					player->noclip * PLAYER_FLAG_NOCLIP;
+	out.put(SECTION_FLAGS);
+	out.put(player->flight * PLAYER_FLAG_FLIGHT |
+			player->noclip * PLAYER_FLAG_NOCLIP);
 
-	files::write_bytes(getPlayerFile(), (const char*)dst, sizeof(dst));
+	files::write_bytes(getPlayerFile(), (const char*)out.data(), out.size());
 }
 
 bool WorldFiles::readPlayer(Player* player) {
@@ -243,28 +275,29 @@ bool WorldFiles::readPlayer(Player* player) {
 		return false;
 	}
 	vec3 position = player->hitbox->position;
-	size_t offset = 0;
-	while (offset < length){
-		char section = data[offset++];
-		switch (section){
+	BinaryReader inp(data, length);
+	while (inp.hasNext()) {
+		ubyte section = inp.get();
+		switch (section) {
 		case SECTION_POSITION:
-			position.x = bytes2Float(data, offset); offset += 4;
-			position.y = bytes2Float(data, offset); offset += 4;
-			position.z = bytes2Float(data, offset); offset += 4;
+			position.x = inp.getFloat32();
+			position.y = inp.getFloat32();
+			position.z = inp.getFloat32();
 			break;
 		case SECTION_ROTATION:
-			player->camX = bytes2Float(data, offset); offset += 4;
-			player->camY = bytes2Float(data, offset); offset += 4;
+			player->camX = inp.getFloat32();
+			player->camY = inp.getFloat32();
 			break;
-		case SECTION_FLAGS:
+		case SECTION_FLAGS: 
 			{
-				ubyte flags = data[offset++];
+				ubyte flags = inp.get();
 				player->flight = flags & PLAYER_FLAG_FLIGHT;
 				player->noclip = flags & PLAYER_FLAG_NOCLIP;
 			}
 			break;
 		}
 	}
+
 	player->hitbox->position = position;
 	player->camera->position = position + vec3(0, 1, 0);
 	return true;
@@ -281,7 +314,7 @@ void WorldFiles::writeRegion(int x, int y, WorldRegion& entry){
 		}
 	}
 
-	char header[10] = ".VOXREG";
+	char header[10] = REGION_FORMAT_MAGIC;
 	header[8] = REGION_FORMAT_VERSION;
 	header[9] = 0; // flags
 	std::ofstream file(getRegionFile(x, y), ios::out | ios::binary);
diff --git a/src/files/WorldFiles.h b/src/files/WorldFiles.h
index eb219a7d..912f4341 100644
--- a/src/files/WorldFiles.h
+++ b/src/files/WorldFiles.h
@@ -17,6 +17,9 @@
 #define REGION_SIZE (1 << (REGION_SIZE_BIT))
 #define REGION_VOL ((REGION_SIZE) * (REGION_SIZE))
 #define REGION_FORMAT_VERSION 1
+#define REGION_FORMAT_MAGIC ".VOXREG"
+#define WORLD_FORMAT_MAGIC ".VOXWLD"
+#define WORLD_FORMAT_VERSION 1
 
 class Player;
 class Chunk;
@@ -27,27 +30,35 @@ struct WorldRegion {
 	bool unsaved;
 };
 
+struct WorldInfo {
+	std::string name;
+	std::filesystem::path directory;
+	uint64_t seed;
+};
+
 class WorldFiles {
+	void writeWorldInfo(const WorldInfo& info);
+	std::filesystem::path getRegionFile(int x, int y) const;
+	std::filesystem::path getPlayerFile() const;
+	std::filesystem::path getWorldFile() const;
 public:
 	std::unordered_map<glm::ivec2, WorldRegion> regions;
 	std::filesystem::path directory;
 	ubyte* compressionBuffer;
 	bool generatorTestMode;
 
-	WorldFiles(std::filesystem::path directory, size_t mainBufferCapacity, bool generatorTestMode);
+	WorldFiles(std::filesystem::path directory, bool generatorTestMode);
 	~WorldFiles();
 
 	void put(Chunk* chunk);
 
+	bool readWorldInfo(WorldInfo& info);
 	bool readPlayer(Player* player);
 	ubyte* readChunkData(int x, int y, uint32_t& length);
 	ubyte* getChunk(int x, int y);
 	void writeRegion(int x, int y, WorldRegion& entry);
 	void writePlayer(Player* player);
-	void write();
-
-	std::filesystem::path getRegionFile(int x, int y);
-	std::filesystem::path getPlayerFile();
+	void write(const WorldInfo info);
 };
 
 #endif /* FILES_WORLDFILES_H_ */
\ No newline at end of file
diff --git a/src/files/binary_io.cpp b/src/files/binary_io.cpp
new file mode 100644
index 00000000..1abd5469
--- /dev/null
+++ b/src/files/binary_io.cpp
@@ -0,0 +1,140 @@
+#include "binary_io.h"
+
+#include <string.h>
+#include <limits>
+#include <stdexcept>
+
+using std::string;
+
+void BinaryWriter::put(ubyte b) {
+    buffer.push_back(b);
+}
+
+void BinaryWriter::putCStr(const char* str) {
+    size_t size = strlen(str)+1;
+    buffer.reserve(buffer.size() + size);
+    for (size_t i = 0; i < size; i++) {
+        buffer.push_back(str[i]);
+    }
+}
+
+void BinaryWriter::put(const string& s) {
+    size_t len = s.length();
+    if (len > INT16_MAX) {
+        throw std::domain_error("length > INT16_MAX");
+    }
+    putInt16(len);
+    put((const ubyte*)s.data(), len);
+}
+
+void BinaryWriter::put(const ubyte* arr, size_t size) {
+    buffer.reserve(buffer.size() + size);
+    for (size_t i = 0; i < size; i++) {
+        buffer.push_back(arr[i]);
+    }
+}
+
+void BinaryWriter::putInt16(int16_t val) {
+    buffer.push_back((char) (val >> 8 & 255));
+    buffer.push_back((char) (val >> 0 & 255));
+}
+
+void BinaryWriter::putInt32(int32_t val) {
+    buffer.reserve(buffer.size() + 4);
+    buffer.push_back((char) (val >> 24 & 255));
+    buffer.push_back((char) (val >> 16 & 255));
+    buffer.push_back((char) (val >> 8 & 255));
+    buffer.push_back((char) (val >> 0 & 255));
+}
+
+void BinaryWriter::putInt64(int64_t val) {
+    buffer.reserve(buffer.size() + 8);
+    buffer.push_back((char) (val >> 56 & 255));
+    buffer.push_back((char) (val >> 48 & 255));
+    buffer.push_back((char) (val >> 40 & 255));
+    buffer.push_back((char) (val >> 32 & 255));
+    buffer.push_back((char) (val >> 24 & 255));
+    buffer.push_back((char) (val >> 16 & 255));
+    buffer.push_back((char) (val >> 8 & 255));
+    buffer.push_back((char) (val >> 0 & 255));
+}
+
+void BinaryWriter::putFloat32(float val) {
+    putInt32(*((uint32_t*)&val));
+}
+
+BinaryReader::BinaryReader(const ubyte* data, size_t size)
+    : data(data), size(size), pos(0) {
+}
+
+void BinaryReader::checkMagic(const char* data, size_t size) {
+    if (pos + size >= this->size) {
+        throw std::runtime_error("invalid magic number");
+    }
+    for (size_t i = 0; i < size; i++) {
+        if (this->data[pos + i] != (ubyte)data[i]){
+            throw std::runtime_error("invalid magic number");
+        }
+    }
+    pos += size;
+}
+
+ubyte BinaryReader::get() {
+    if (pos == size) {
+        throw std::underflow_error("buffer underflow");
+    }
+    return data[pos++];
+}
+
+int16_t BinaryReader::getInt16() {
+    if (pos+2 >= size) {
+        throw std::underflow_error("unexpected end");
+    }
+    pos += 2;
+    return (data[pos - 2] << 8) | 
+           (data[pos - 1]);
+}
+
+int32_t BinaryReader::getInt32() {
+    if (pos+4 >= size) {
+        throw std::underflow_error("unexpected end");
+    }
+    pos += 4;
+    return (data[pos - 4] << 24) | 
+           (data[pos - 3] << 16) | 
+           (data[pos - 2] << 8) | 
+           (data[pos - 1]);
+}
+
+int64_t BinaryReader::getInt64() {
+    if (pos+8 >= size) {
+        throw std::underflow_error("unexpected end");
+    }
+    pos += 8;
+    return ((int64_t)data[pos - 8] << 56) | 
+           ((int64_t)data[pos - 7] << 48) | 
+           ((int64_t)data[pos - 6] << 40) | 
+           ((int64_t)data[pos - 5] << 32) | 
+           ((int64_t)data[pos - 4] << 24) | 
+           ((int64_t)data[pos - 3] << 16) | 
+           ((int64_t)data[pos - 2] << 8) | 
+           ((int64_t)data[pos - 1]);
+}
+
+float BinaryReader::getFloat32() {
+    int32_t value = getInt32();
+    return *(float*)(&value);
+}
+
+string BinaryReader::getString() {
+    uint16_t length = (uint16_t)getInt16();
+    if (pos+length >= size) {
+        throw std::underflow_error("unexpected end");
+    }
+    pos += length;
+    return string((const char*)(data+pos-length), length);
+}
+
+bool BinaryReader::hasNext() const {
+    return pos < size;
+}
diff --git a/src/files/binary_io.h b/src/files/binary_io.h
new file mode 100644
index 00000000..cd68fd59
--- /dev/null
+++ b/src/files/binary_io.h
@@ -0,0 +1,45 @@
+#ifndef FILES_BINARY_WRITER_H_
+#define FILES_BINARY_WRITER_H_
+
+#include <string>
+#include <vector>
+#include "../typedefs.h"
+
+class BinaryWriter {
+    std::vector<ubyte> buffer;
+public:
+    void put(ubyte b);
+    void putCStr(const char* str);
+    void putInt16(int16_t val);
+    void putInt32(int32_t val);
+    void putInt64(int64_t val);
+    void putFloat32(float val);
+    void put(const std::string& s);
+    void put(const ubyte* arr, size_t size);
+
+    inline size_t size() const {
+        return buffer.size();
+    }
+    inline const ubyte* data() const {
+        return buffer.data();
+    }
+};
+
+class BinaryReader {
+    const ubyte* data;
+    size_t size;
+    size_t pos;
+public:
+    BinaryReader(const ubyte* data, size_t size);
+
+    void checkMagic(const char* data, size_t size);
+    ubyte get();
+    int16_t getInt16();
+    int32_t getInt32();
+    int64_t getInt64();
+    float getFloat32();
+    std::string getString();
+    bool hasNext() const;
+};
+
+#endif // FILES_BINARY_WRITER_H_
\ No newline at end of file
diff --git a/src/frontend/screens.cpp b/src/frontend/screens.cpp
index 20af3d0c..3d746415 100644
--- a/src/frontend/screens.cpp
+++ b/src/frontend/screens.cpp
@@ -46,7 +46,7 @@ MenuScreen::MenuScreen(Engine* engine_) : Screen(engine_) {
             path folder = enginefs::get_worlds_folder()/path("world");
             World* world = new World("world", folder, 42, settings);
 
-            auto screen = new LevelScreen(engine, world->loadLevel(settings));
+            auto screen = new LevelScreen(engine, world->load(settings));
             engine->setScreen(shared_ptr<Screen>(screen));
         });
         panel->add(shared_ptr<UINode>(button));
diff --git a/src/voxels/Chunks.cpp b/src/voxels/Chunks.cpp
index 6d055d98..55eeef07 100644
--- a/src/voxels/Chunks.cpp
+++ b/src/voxels/Chunks.cpp
@@ -97,17 +97,15 @@ light_t Chunks::getLight(int x, int y, int z){
 }
 
 Chunk* Chunks::getChunkByVoxel(int x, int y, int z){
+	if (y < 0 || y >= CHUNK_H)
+		return nullptr;
 	x -= ox * CHUNK_W;
 	z -= oz * CHUNK_D;
-	int cx = x / CHUNK_W;
-	int cy = y / CHUNK_H;
-	int cz = z / CHUNK_D;
-	if (x < 0) cx--;
-	if (y < 0) cy--;
-	if (z < 0) cz--;
-	if (cx < 0 || cy < 0 || cz < 0 || cx >= w || cy >= 1 || cz >= d)
+	int cx = floordiv(x, CHUNK_W);
+	int cz = floordiv(z, CHUNK_D);
+	if (cx < 0 || cz < 0 || cx >= w || cz >= d)
 		return nullptr;
-	return chunks[(cy * d + cz) * w + cx].get();
+	return chunks[cz * w + cx].get();
 }
 
 Chunk* Chunks::getChunk(int x, int z){
@@ -119,14 +117,12 @@ Chunk* Chunks::getChunk(int x, int z){
 }
 
 void Chunks::set(int x, int y, int z, int id, uint8_t states){
-	x -= ox * CHUNK_W;
-	z -= oz * CHUNK_D;
-	int cx = x / CHUNK_W;
 	if (y < 0 || y >= CHUNK_H)
 		return;
-	int cz = z / CHUNK_D;
-	if (x < 0) cx--;
-	if (z < 0) cz--;
+	x -= ox * CHUNK_W;
+	z -= oz * CHUNK_D;
+	int cx = floordiv(x, CHUNK_W);
+	int cz = floordiv(z, CHUNK_D);
 	if (cx < 0 || cz < 0 || cx >= w || cz >= d)
 		return;
 	Chunk* chunk = chunks[cz * w + cx].get();
@@ -143,17 +139,26 @@ void Chunks::set(int x, int y, int z, int id, uint8_t states){
 	else if (y + 1 > chunk->top) chunk->top = y + 1;
 	else if (id == 0) chunk->updateHeights();
 
-	if (lx == 0 && (chunk = getChunk(cx+ox-1, cz+oz))) chunk->setModified(true);
-	if (lz == 0 && (chunk = getChunk(cx+ox, cz+oz-1))) chunk->setModified(true);
+	if (lx == 0 && (chunk = getChunk(cx+ox-1, cz+oz))) 
+		chunk->setModified(true);
+	if (lz == 0 && (chunk = getChunk(cx+ox, cz+oz-1))) 
+		chunk->setModified(true);
 
-	if (lx == CHUNK_W-1 && (chunk = getChunk(cx+ox+1, cz+oz))) chunk->setModified(true);
-	if (lz == CHUNK_D-1 && (chunk = getChunk(cx+ox, cz+oz+1))) chunk->setModified(true);
+	if (lx == CHUNK_W-1 && (chunk = getChunk(cx+ox+1, cz+oz))) 
+		chunk->setModified(true);
+	if (lz == CHUNK_D-1 && (chunk = getChunk(cx+ox, cz+oz+1))) 
+		chunk->setModified(true);
 }
 
-voxel* Chunks::rayCast(vec3 a, vec3 dir, float maxDist, vec3& end, vec3& norm, vec3& iend) {
-	float px = a.x;
-	float py = a.y;
-	float pz = a.z;
+voxel* Chunks::rayCast(vec3 start, 
+					   vec3 dir, 
+					   float maxDist, 
+					   vec3& end, 
+					   vec3& norm, 
+					   vec3& iend) {
+	float px = start.x;
+	float py = start.y;
+	float pz = start.z;
 
 	float dx = dir.x;
 	float dy = dir.y;
@@ -239,14 +244,10 @@ voxel* Chunks::rayCast(vec3 a, vec3 dir, float maxDist, vec3& end, vec3& norm, v
 }
 
 void Chunks::setCenter(int x, int z) {
-	int cx = x / CHUNK_W;
-	int cz = z / CHUNK_D;
-	cx -= ox;
-	cz -= oz;
-	if (x < 0) cx--;
-	if (z < 0) cz--;
-	cx -= w/2;
-	cz -= d/2;
+	int cx = floordiv(x, CHUNK_W);
+	int cz = floordiv(z, CHUNK_D);
+	cx -= ox + w / 2;
+	cz -= oz + d / 2;
 	if (cx | cz) {
 		translate(cx,cz);
 	}
@@ -295,8 +296,8 @@ void Chunks::resize(int newW, int newD) {
 		translate(0, delta);
 	}
 	const int newVolume = newW * newD;
-	shared_ptr<Chunk>* newChunks = new shared_ptr<Chunk>[newVolume] {};
-	shared_ptr<Chunk>* newChunksSecond = new shared_ptr<Chunk>[newVolume] {};
+	auto newChunks = new shared_ptr<Chunk>[newVolume] {};
+	auto newChunksSecond = new shared_ptr<Chunk>[newVolume] {};
 	for (int z = 0; z < d && z < newD; z++) {
 		for (int x = 0; x < w && x < newW; x++) {
 			newChunks[z * newW + x] = chunks[z * w + x];
diff --git a/src/voxels/Chunks.h b/src/voxels/Chunks.h
index e7ec5d13..b8ae4102 100644
--- a/src/voxels/Chunks.h
+++ b/src/voxels/Chunks.h
@@ -13,6 +13,7 @@ class voxel;
 class WorldFiles;
 class LevelEvents;
 
+/* Player-centred chunks matrix */
 class Chunks {
 public:
 	std::shared_ptr<Chunk>* chunks;
@@ -25,7 +26,8 @@ public:
 	WorldFiles* worldFiles;
 	LevelEvents* events;
 
-	Chunks(int w, int d, int ox, int oz, WorldFiles* worldFiles, LevelEvents* events);
+	Chunks(int w, int d, int ox, int oz, 
+		   WorldFiles* worldFiles, LevelEvents* events);
 	~Chunks();
 
 	bool putChunk(std::shared_ptr<Chunk> chunk);
@@ -36,7 +38,13 @@ public:
 	light_t getLight(int x, int y, int z);
 	ubyte getLight(int x, int y, int z, int channel);
 	void set(int x, int y, int z, int id, uint8_t states);
-	voxel* rayCast(glm::vec3 start, glm::vec3 dir, float maxLength, glm::vec3& end, glm::vec3& norm, glm::vec3& iend);
+
+	voxel* rayCast(glm::vec3 start, 
+				   glm::vec3 dir, 
+				   float maxLength, 
+				   glm::vec3& end, 
+				   glm::vec3& norm, 
+				   glm::vec3& iend);
 
 	bool isObstacle(int x, int y, int z);
 
diff --git a/src/voxels/ChunksController.cpp b/src/voxels/ChunksController.cpp
index 6785ca57..deb7de7f 100644
--- a/src/voxels/ChunksController.cpp
+++ b/src/voxels/ChunksController.cpp
@@ -15,16 +15,10 @@
 #include <memory>
 #include <chrono>
 
-#if defined(_WIN32) && defined(__MINGW32__)
-#define _WIN32_WINNT 0x0501
-#include <mingw.thread.h>
-#else
-#include <thread>
-#endif
-
 #define MAX_WORK_PER_FRAME 16
 #define MIN_SURROUNDING 9
 
+using std::unique_ptr;
 using std::shared_ptr;
 using std::chrono::high_resolution_clock;
 using std::chrono::duration_cast;
@@ -63,8 +57,8 @@ bool ChunksController::loadVisible(){
 	int nearX = 0;
 	int nearZ = 0;
 	int minDistance = ((w-padding*2)/2)*((w-padding*2)/2);
-	for (int z = padding; z < d-padding; z++){
-		for (int x = padding; x < w-padding; x++){
+	for (uint z = padding; z < d-padding; z++){
+		for (uint x = padding; x < w-padding; x++){
 			int index = z * w + x;
 			shared_ptr<Chunk> chunk = chunks->chunks[index];
 			if (chunk != nullptr){
@@ -101,14 +95,7 @@ bool ChunksController::loadVisible(){
 		return false;
 	}
 
-	chunk = shared_ptr<Chunk>(new Chunk(nearX+ox, nearZ+oz));
-	level->chunksStorage->store(chunk);
-	ubyte* data = level->world->wfile->getChunk(chunk->x, chunk->z);
-	if (data) {
-		chunk->decode(data);
-		chunk->setLoaded(true);
-		delete[] data;
-	}
+	chunk = level->chunksStorage->create(nearX+ox, nearZ+oz);
 	chunks->putChunk(chunk);
 
 	if (!chunk->isLoaded()) {
diff --git a/src/voxels/ChunksStorage.cpp b/src/voxels/ChunksStorage.cpp
index 77d508b0..50624f1a 100644
--- a/src/voxels/ChunksStorage.cpp
+++ b/src/voxels/ChunksStorage.cpp
@@ -4,14 +4,18 @@
 
 #include "VoxelsVolume.h"
 #include "Chunk.h"
+#include "../files/WorldFiles.h"
+#include "../world/Level.h"
+#include "../world/World.h"
 #include "../maths/voxmaths.h"
 #include "../lighting/Lightmap.h"
-
+#include "../typedefs.h"
 
 using glm::ivec2;
+using std::unique_ptr;
 using std::shared_ptr;
 
-ChunksStorage::ChunksStorage() {
+ChunksStorage::ChunksStorage(Level* level) : level(level) {
 }
 
 ChunksStorage::~ChunksStorage() {
@@ -36,6 +40,17 @@ void ChunksStorage::remove(int x, int z) {
 	}
 }
 
+std::shared_ptr<Chunk> ChunksStorage::create(int x, int z) {
+	auto chunk = shared_ptr<Chunk>(new Chunk(x, z));
+	store(chunk);
+	unique_ptr<ubyte> data(level->world->wfile->getChunk(chunk->x, chunk->z));
+	if (data) {
+		chunk->decode(data.get());
+		chunk->setLoaded(true);
+	}
+	return chunk;
+}
+
 // some magic code
 void ChunksStorage::getVoxels(VoxelsVolume* volume) const {
 	voxel* voxels = volume->getVoxels();
@@ -70,13 +85,13 @@ void ChunksStorage::getVoxels(VoxelsVolume* volume) const {
 						for (int lx = max(x, cx * CHUNK_W);
 							lx < min(x + w, (cx + 1) * CHUNK_W);
 							lx++) {
-							voxels[vox_index(lx - x, ly - y, lz - z, w, d)].id = BLOCK_VOID;
-							lights[vox_index(lx - x, ly - y, lz - z, w, d)] = 0;
+							uint idx = vox_index(lx - x, ly - y, lz - z, w, d);
+							voxels[idx].id = BLOCK_VOID;
+							lights[idx] = 0;
 						}
 					}
 				}
-			}
-			else {
+			} else {
 				const std::shared_ptr<Chunk>& chunk = found->second;
 				const voxel* cvoxels = chunk->voxels;
 				const light_t* clights = chunk->lightmap->getLights();
@@ -87,10 +102,11 @@ void ChunksStorage::getVoxels(VoxelsVolume* volume) const {
 						for (int lx = max(x, cx * CHUNK_W);
 							lx < min(x + w, (cx + 1) * CHUNK_W);
 							lx++) {
-							voxels[vox_index(lx - x, ly - y, lz - z, w, d)] =
-								cvoxels[vox_index(lx - cx * CHUNK_W, ly, lz - cz * CHUNK_D, CHUNK_W, CHUNK_D)];
-							lights[vox_index(lx - x, ly - y, lz - z, w, d)] =
-								clights[vox_index(lx - cx * CHUNK_W, ly, lz - cz * CHUNK_D, CHUNK_W, CHUNK_D)];
+							uint vidx = vox_index(lx - x, ly - y, lz - z, w, d);
+							uint cidx = vox_index(lx - cx * CHUNK_W, ly, 
+										lz - cz * CHUNK_D, CHUNK_W, CHUNK_D);
+							voxels[vidx] = cvoxels[cidx];
+							lights[vidx] = clights[cidx];
 						}
 					}
 				}
diff --git a/src/voxels/ChunksStorage.h b/src/voxels/ChunksStorage.h
index 24c415b7..fbd96a70 100644
--- a/src/voxels/ChunksStorage.h
+++ b/src/voxels/ChunksStorage.h
@@ -10,18 +10,21 @@
 #include "glm/gtx/hash.hpp"
 
 class Chunk;
+class Level;
 class VoxelsVolume;
 
 class ChunksStorage {
+	Level* level;
 	std::unordered_map<glm::ivec2, std::shared_ptr<Chunk>> chunksMap;
 public:
-	ChunksStorage();
+	ChunksStorage(Level* level);
 	virtual ~ChunksStorage();
 
-	std::shared_ptr<Chunk> get(int x, int y) const;
+	std::shared_ptr<Chunk> get(int x, int z) const;
 	void store(std::shared_ptr<Chunk> chunk);
 	void remove(int x, int y);
 	void getVoxels(VoxelsVolume* volume) const;
+	std::shared_ptr<Chunk> create(int x, int z);
 
 	light_t getLight(int x, int y, int z, ubyte channel) const;
 };
diff --git a/src/world/Level.cpp b/src/world/Level.cpp
index fbc47b9f..d49ac6ea 100644
--- a/src/world/Level.cpp
+++ b/src/world/Level.cpp
@@ -11,11 +11,11 @@
 #include "../objects/Player.h"
 #include "../objects/player_control.h"
 
-Level::Level(World* world, Player* player, ChunksStorage* chunksStorage, LevelEvents* events, EngineSettings& settings) :
-		world(world),
+Level::Level(World* world, Player* player, EngineSettings& settings) 
+	  : world(world),
 		player(player),
-		chunksStorage(chunksStorage),
-		events(events) {
+		chunksStorage(new ChunksStorage(this)),
+		events(new LevelEvents()) {
     physics = new PhysicsSolver(vec3(0, -19.6f, 0));
 
     uint matrixSize = (settings.chunks.loadDistance+
@@ -25,7 +25,8 @@ Level::Level(World* world, Player* player, ChunksStorage* chunksStorage, LevelEv
 		world->wfile, 
 		events);
 	lighting = new Lighting(chunks);
-	chunksController = new ChunksController(this, chunks, lighting, settings.chunks.padding);
+	chunksController = new ChunksController(this, chunks, lighting, 
+											settings.chunks.padding);
 	playerController = new PlayerController(this, settings);
 
 	events->listen(EVT_CHUNK_HIDDEN, [this](lvl_event_type type, Chunk* chunk) {
diff --git a/src/world/Level.h b/src/world/Level.h
index 32209d63..34ea8d31 100644
--- a/src/world/Level.h
+++ b/src/world/Level.h
@@ -28,8 +28,6 @@ public:
 
 	Level(World* world, 
 	      Player* player, 
-	      ChunksStorage* chunksStorage,
-	      LevelEvents* events,
 	      EngineSettings& settings);
 	~Level();
 
diff --git a/src/world/World.cpp b/src/world/World.cpp
index f063ef93..03bb61be 100644
--- a/src/world/World.cpp
+++ b/src/world/World.cpp
@@ -9,15 +9,19 @@
 #include "../voxels/Chunks.h"
 #include "../voxels/ChunksStorage.h"
 #include "../objects/Player.h"
-#include "../physics/PhysicsSolver.h"
 #include "../window/Camera.h"
-#include "../world/LevelEvents.h"
 
 using glm::vec3;
 using std::shared_ptr;
+using std::string;
+using std::filesystem::path;
 
-World::World(std::string name, std::filesystem::path directory, int seed, EngineSettings& settings) : name(name), seed(seed) {
-	wfile = new WorldFiles(directory, REGION_VOL * (CHUNK_DATA_LEN * 2 + 8), settings.debug.generatorTestMode);
+World::World(string name, 
+			 path directory, 
+			 uint64_t seed, 
+			 EngineSettings& settings) 
+			: name(name), seed(seed) {
+	wfile = new WorldFiles(directory, settings.debug.generatorTestMode);
 }
 
 World::~World(){
@@ -34,18 +38,20 @@ void World::write(Level* level, bool writeChunks) {
 		wfile->put(chunk.get());
 	}
 
-	wfile->write();
+	wfile->write(WorldInfo {name, wfile->directory, seed});
 	wfile->writePlayer(level->player);
 }
 
-Level* World::loadLevel(EngineSettings& settings) {
-	ChunksStorage* storage = new ChunksStorage();
-	LevelEvents* events = new LevelEvents();
+Level* World::load(EngineSettings& settings) {
+	WorldInfo info {name, wfile->directory, seed};
+	wfile->readWorldInfo(info);
+	seed = info.seed;
+	name = info.name;
 
 	vec3 playerPosition = vec3(0, 64, 0);
 	Camera* camera = new Camera(playerPosition, glm::radians(90.0f));
 	Player* player = new Player(playerPosition, 4.0f, camera);
-	Level* level = new Level(this, player, storage, events, settings);
+	Level* level = new Level(this, player, settings);
 	wfile->readPlayer(player);
 
 	camera->rotation = mat4(1.0f);
diff --git a/src/world/World.h b/src/world/World.h
index 68427996..c2d12694 100644
--- a/src/world/World.h
+++ b/src/world/World.h
@@ -15,13 +15,16 @@ class World {
 public:
 	std::string name;
 	WorldFiles* wfile;
-	int seed;
+	uint64_t seed;
 
-	World(std::string name, std::filesystem::path directory, int seed, EngineSettings& settings);
+	World(std::string name, 
+		  std::filesystem::path directory, 
+		  uint64_t seed, 
+		  EngineSettings& settings);
 	~World();
 
 	void write(Level* level, bool writeChunks);
-	Level* loadLevel(EngineSettings& settings);
+	Level* load(EngineSettings& settings);
 };
 
 #endif /* WORLD_WORLD_H_ */
\ No newline at end of file