diff --git a/Cargo.toml b/Cargo.toml
index 4c6d95c..d22095b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "worldgen"
+name = "world"
 version = "0.1.0"
 edition = "2024"
 
@@ -9,5 +9,5 @@ rand = "0.9.2"
 rand_chacha = "0.9.0"
 nbt = { git = "https://github.com/Cactus-minecraft-server/nbt.git" }
 [lib]
-name = "worldgen"
+name = "world"
 path = "src/lib.rs"
diff --git a/src/level.rs b/src/level.rs
index d47ff3e..9b018ec 100644
--- a/src/level.rs
+++ b/src/level.rs
@@ -1,79 +1,385 @@
+use nbt::{Tag, write_nbt};
+use std::collections::HashMap;
 use std::fs::File;
 
-use nbt::{Tag, write_nbt};
+pub struct LevelDat {
+    pub custom_boss_events: CustomBossEvents,
+    pub data_packs: DataPacks,
+    pub dragon_fight: DragonFight,
+    pub game_rules: GameRules,
+    pub version: VersionInfo,
+    pub world_gen_settings: WorldGenSettings,
+    pub scheduled_events: ScheduledEvents,
+    pub server_brands: ServerBrands,
 
-pub fn create_nbt(
-    seed: i64,
-    is_hardcore: bool,
-    structures: bool,
-    raining: bool,
-    thundering: bool,
-    game_type: i32,
-    generator_version: i32,
-    raintime: i32,
-    spawnx: i32,
-    spawny: i32,
-    spawnz: i32,
-    thundertime: i32,
-    version: i32,
-    last_played: i64,
-    disk_size: i64,
-    time: i64,
-    generator_name: String,
-    level_name: String,
-    path: String,
-) -> std::io::Result<()> {
+    pub allow_commands: bool,
+
+    pub border_center_x: f64,
+    pub border_center_z: f64,
+    pub border_damage_per_block: f64,
+    pub border_safe_zone: f64,
+    pub border_size: f64,
+    pub border_size_lerp_target: f64,
+    pub border_size_lerp_time: i64,
+    pub border_warning_blocks: i32,
+    pub border_warning_time: i32,
+
+    pub clear_weather_time: i32,
+    pub data_version: i32,
+    pub day_time: i64,
+    pub difficulty: i8,
+    pub difficulty_locked: bool,
+    pub game_type: i32,
+    pub hardcore: bool,
+    pub initialized: bool,
+    pub last_played: i64,
+    pub level_name: String,
+    pub raining: bool,
+    pub rain_time: i32,
+    pub spawn_angle: f32,
+    pub spawn_x: i32,
+    pub spawn_y: i32,
+    pub spawn_z: i32,
+    pub thundering: bool,
+    pub thunder_time: i32,
+    pub time: i64,
+    pub version_id: i32,
+    pub wandering_trader_spawn_chance: i32,
+    pub wandering_trader_spawn_delay: i32,
+    pub was_modded: bool,
+}
+
+pub struct CustomBossEvents {}
+
+pub struct DataPacks {
+    pub disabled: Vec<String>,
+    pub enabled: Vec<String>,
+}
+
+pub struct DragonFight {
+    pub gateways: Vec<i32>,
+    pub dragon_killed: bool,
+    pub needs_state_scanning: bool,
+    pub previously_killed: bool,
+}
+
+pub type GameRules = HashMap<String, String>;
+
+pub struct VersionInfo {
+    pub id: i32,
+    pub name: String,
+    pub series: String,
+    pub snapshot: i8,
+}
+
+pub enum Dimension {
+    Overworld,
+    End,
+    Nether,
+}
+
+pub struct WorldGenSettings {
+    pub dimensions: HashMap<String, Dimension>,
+    pub bonus_chest: bool,
+    pub generate_features: bool,
+    pub seed: i64,
+}
+
+pub struct ScheduledEvents {}
+
+pub type ServerBrands = Vec<String>;
+fn dim_to_str(d: &Dimension) -> &'static str {
+    match d {
+        Dimension::Overworld => "overworld",
+        Dimension::End => "the_end",
+        Dimension::Nether => "the_nether",
+    }
+}
+
+pub fn create_nbt(level: &LevelDat, path: &str) -> std::io::Result<()> {
     let mut root = Tag::new_compound("Data");
-    root.insert("RandomSeed".to_string(), Tag::new_long("RandomSeed", seed));
+
+    // --- primitives (root) ---
+    root.insert(
+        "allowCommands".to_string(),
+        Tag::new_byte("allowCommands", i8::from(level.allow_commands)),
+    );
+
+    root.insert(
+        "BorderCenterX".to_string(),
+        Tag::new_double("BorderCenterX", level.border_center_x),
+    );
+    root.insert(
+        "BorderCenterZ".to_string(),
+        Tag::new_double("BorderCenterZ", level.border_center_z),
+    );
+    root.insert(
+        "BorderDamagePerBlock".to_string(),
+        Tag::new_double("BorderDamagePerBlock", level.border_damage_per_block),
+    );
+    root.insert(
+        "BorderSafeZone".to_string(),
+        Tag::new_double("BorderSafeZone", level.border_safe_zone),
+    );
+    root.insert(
+        "BorderSize".to_string(),
+        Tag::new_double("BorderSize", level.border_size),
+    );
+    root.insert(
+        "BorderSizeLerpTarget".to_string(),
+        Tag::new_double("BorderSizeLerpTarget", level.border_size_lerp_target),
+    );
+    root.insert(
+        "BorderSizeLerpTime".to_string(),
+        Tag::new_long("BorderSizeLerpTime", level.border_size_lerp_time),
+    );
+    root.insert(
+        "BorderWarningBlocks".to_string(),
+        Tag::new_int("BorderWarningBlocks", level.border_warning_blocks),
+    );
+    root.insert(
+        "BorderWarningTime".to_string(),
+        Tag::new_int("BorderWarningTime", level.border_warning_time),
+    );
+
+    root.insert(
+        "clearWeatherTime".to_string(),
+        Tag::new_int("clearWeatherTime", level.clear_weather_time),
+    );
+    root.insert(
+        "DataVersion".to_string(),
+        Tag::new_int("DataVersion", level.data_version),
+    );
+    root.insert(
+        "DayTime".to_string(),
+        Tag::new_long("DayTime", level.day_time),
+    );
+    root.insert(
+        "Difficulty".to_string(),
+        Tag::new_byte("Difficulty", level.difficulty),
+    );
+    root.insert(
+        "DifficultyLocked".to_string(),
+        Tag::new_byte("DifficultyLocked", i8::from(level.difficulty_locked)),
+    );
+    root.insert(
+        "GameType".to_string(),
+        Tag::new_int("GameType", level.game_type),
+    );
     root.insert(
         "hardcore".to_string(),
-        Tag::new_byte("hardcore", i8::from(is_hardcore)),
+        Tag::new_byte("hardcore", i8::from(level.hardcore)),
     );
     root.insert(
-        "MapFeatures".to_string(),
-        Tag::new_byte("MapFeatures", i8::from(structures)),
+        "initialized".to_string(),
+        Tag::new_byte("initialized", i8::from(level.initialized)),
     );
-    root.insert(
-        "raining".to_string(),
-        Tag::new_byte("raining", i8::from(raining)),
-    );
-    root.insert(
-        "thundering".to_string(),
-        Tag::new_byte("thundering", i8::from(thundering)),
-    );
-    root.insert("GameType".to_string(), Tag::new_int("GameType", game_type));
-    root.insert(
-        "GeneratorVersion".to_string(),
-        Tag::new_int("GeneratorVersion", generator_version),
-    );
-    root.insert("RainTime".to_string(), Tag::new_int("RainTime", raintime));
-    root.insert("SpawnX".to_string(), Tag::new_int("SpawnX", spawnx));
-    root.insert("SpawnY".to_string(), Tag::new_int("SpawnY", spawny));
-    root.insert("SpawnZ".to_string(), Tag::new_int("SpawnZ", spawnz));
-    root.insert(
-        "ThunderTime".to_string(),
-        Tag::new_int("ThunderTime", thundertime),
-    );
-    root.insert("Version".to_string(), Tag::new_int("Version", version));
     root.insert(
         "LastPlayed".to_string(),
-        Tag::new_long("LastPlayed", last_played),
-    ); // Not sure if I should keep LastPlayed field because of the fact that this isn't for a
-    // client world but for a server world
-    root.insert(
-        "SizeOnDisk".to_string(),
-        Tag::new_long("SizeOnDisk", disk_size),
-    );
-    root.insert("Time".to_string(), Tag::new_long("Time", time));
-    root.insert(
-        "GeneratorName".to_string(),
-        Tag::new_string("GeneratorName", generator_name),
+        Tag::new_long("LastPlayed", level.last_played),
     );
     root.insert(
         "LevelName".to_string(),
-        Tag::new_string("LevelName", level_name),
+        Tag::new_string("LevelName", level.level_name.clone()),
     );
-    let file = File::create(path)?;
+    root.insert(
+        "raining".to_string(),
+        Tag::new_byte("raining", i8::from(level.raining)),
+    );
+    root.insert(
+        "RainTime".to_string(),
+        Tag::new_int("RainTime", level.rain_time),
+    );
+    root.insert(
+        "SpawnAngle".to_string(),
+        Tag::new_float("SpawnAngle", level.spawn_angle),
+    );
+    root.insert("SpawnX".to_string(), Tag::new_int("SpawnX", level.spawn_x));
+    root.insert("SpawnY".to_string(), Tag::new_int("SpawnY", level.spawn_y));
+    root.insert("SpawnZ".to_string(), Tag::new_int("SpawnZ", level.spawn_z));
+    root.insert(
+        "thundering".to_string(),
+        Tag::new_byte("thundering", i8::from(level.thundering)),
+    );
+    root.insert(
+        "ThunderTime".to_string(),
+        Tag::new_int("ThunderTime", level.thunder_time),
+    );
+    root.insert("Time".to_string(), Tag::new_long("Time", level.time));
+    root.insert(
+        "version".to_string(),
+        Tag::new_int("version", level.version_id),
+    );
+    root.insert(
+        "WanderingTraderSpawnChance".to_string(),
+        Tag::new_int(
+            "WanderingTraderSpawnChance",
+            level.wandering_trader_spawn_chance,
+        ),
+    );
+    root.insert(
+        "WanderingTraderSpawnDelay".to_string(),
+        Tag::new_int(
+            "WanderingTraderSpawnDelay",
+            level.wandering_trader_spawn_delay,
+        ),
+    );
+    root.insert(
+        "WasModded".to_string(),
+        Tag::new_byte("WasModded", i8::from(level.was_modded)),
+    );
+
+    // Mirror of older key from your example, sourced from struct:
+    root.insert(
+        "RandomSeed".to_string(),
+        Tag::new_long("RandomSeed", level.world_gen_settings.seed),
+    );
+    root.insert(
+        "MapFeatures".to_string(),
+        Tag::new_byte(
+            "MapFeatures",
+            i8::from(level.world_gen_settings.generate_features),
+        ),
+    );
+
+    // --- GameRules ---
+    let mut gr = Tag::new_compound("GameRules");
+    for (k, v) in &level.game_rules {
+        gr.insert(k.clone(), Tag::new_string(k, v.clone()));
+    }
+    root.insert("GameRules".to_string(), gr);
+
+    // --- Version (compound) ---
+    let mut ver = Tag::new_compound("Version");
+    ver.insert("Id".to_string(), Tag::new_int("Id", level.version.id));
+    ver.insert(
+        "Name".to_string(),
+        Tag::new_string("Name", level.version.name.clone()),
+    );
+    ver.insert(
+        "Series".to_string(),
+        Tag::new_string("Series", level.version.series.clone()),
+    );
+    ver.insert(
+        "Snapshot".to_string(),
+        Tag::new_byte("Snapshot", level.version.snapshot),
+    );
+    root.insert("Version".to_string(), ver);
+
+    // --- DataPacks ---
+    let mut dp = Tag::new_compound("DataPacks");
+    let enabled_list: Vec<Tag> = level
+        .data_packs
+        .enabled
+        .iter()
+        .cloned()
+        .map(|s| Tag::new_string("", s))
+        .collect();
+    let disabled_list: Vec<Tag> = level
+        .data_packs
+        .disabled
+        .iter()
+        .cloned()
+        .map(|s| Tag::new_string("", s))
+        .collect();
+    dp.insert(
+        "Enabled".to_string(),
+        Tag::new_list("Enabled", 8, enabled_list),
+    );
+    dp.insert(
+        "Disabled".to_string(),
+        Tag::new_list("Disabled", 8, disabled_list),
+    );
+
+    root.insert("DataPacks".to_string(), dp);
+
+    // --- DragonFight ---
+    let mut df = Tag::new_compound("DragonFight");
+    let gateways_list: Vec<Tag> = level
+        .dragon_fight
+        .gateways
+        .iter()
+        .copied()
+        .map(|n| Tag::new_int("", n))
+        .collect();
+    df.insert(
+        "Gateways".to_string(),
+        Tag::new_list("Gateways", 3, gateways_list),
+    );
+    df.insert(
+        "DragonKilled".to_string(),
+        Tag::new_byte("DragonKilled", i8::from(level.dragon_fight.dragon_killed)),
+    );
+    df.insert(
+        "NeedsStateScanning".to_string(),
+        Tag::new_byte(
+            "NeedsStateScanning",
+            i8::from(level.dragon_fight.needs_state_scanning),
+        ),
+    );
+    df.insert(
+        "PreviouslyKilled".to_string(),
+        Tag::new_byte(
+            "PreviouslyKilled",
+            i8::from(level.dragon_fight.previously_killed),
+        ),
+    );
+    root.insert("DragonFight".to_string(), df);
+
+    // --- WorldGenSettings ---
+    let mut dims = Tag::new_compound("dimensions");
+    for (name, dim) in &level.world_gen_settings.dimensions {
+        dims.insert(
+            name.clone(),
+            Tag::new_string(name, dim_to_str(dim).to_string()),
+        );
+    }
+    let mut wgs = Tag::new_compound("WorldGenSettings");
+    wgs.insert(
+        "seed".to_string(),
+        Tag::new_long("seed", level.world_gen_settings.seed),
+    );
+    wgs.insert(
+        "generate_features".to_string(),
+        Tag::new_byte(
+            "generate_features",
+            i8::from(level.world_gen_settings.generate_features),
+        ),
+    );
+    wgs.insert(
+        "bonus_chest".to_string(),
+        Tag::new_byte(
+            "bonus_chest",
+            i8::from(level.world_gen_settings.bonus_chest),
+        ),
+    );
+    wgs.insert("dimensions".to_string(), dims);
+    root.insert("WorldGenSettings".to_string(), wgs);
+
+    // --- ServerBrands ---
+    let brands_list: Vec<Tag> = level
+        .server_brands
+        .iter()
+        .cloned()
+        .map(|s| Tag::new_string("", s))
+        .collect();
+    root.insert(
+        "ServerBrands".to_string(),
+        Tag::new_list("ServerBrands", 8, brands_list),
+    );
+
+    // --- CustomBossEvents / ScheduledEvents (empty compounds for now) ---
+    root.insert(
+        "CustomBossEvents".to_string(),
+        Tag::new_compound("CustomBossEvents"),
+    );
+    root.insert(
+        "ScheduledEvents".to_string(),
+        Tag::new_compound("ScheduledEvents"),
+    );
+
+    // --- write ---
+    let file = File::create(format!("{path}/level.dat"))?;
     write_nbt(&root, file)?;
     Ok(())
 }
diff --git a/src/test.rs b/src/test.rs
index d54ef03..d36592f 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -48,33 +48,90 @@ mod perlin_test {
 /// Test for level.rs
 #[cfg(test)]
 mod level_file_test {
-    use crate::level::create_nbt;
+    use crate::level::{
+        CustomBossEvents, DataPacks, Dimension, DragonFight, LevelDat, ScheduledEvents,
+        ServerBrands, VersionInfo, WorldGenSettings, create_nbt,
+    };
+    use std::collections::HashMap;
+
     #[test]
-    fn test_creation_of_file() -> () {
-        let result = create_nbt(
-            1234,
-            true,
-            true,
-            true,
-            true,
-            1,
-            1,
-            1,
-            0,
-            0,
-            0,
-            213,
-            1235,
-            55555,
-            90000,
-            900,
-            "test".to_string(),
-            "test".to_string(),
-            "target/level.dat".to_string(),
-        );
-        assert_eq!(result.is_ok(), true);
+    fn test_creation_of_file() {
+        let mut game_rules: HashMap<String, String> = HashMap::new();
+        game_rules.insert("doDaylightCycle".into(), "true".into());
+
+        let mut dimensions: HashMap<String, Dimension> = HashMap::new();
+        dimensions.insert("minecraft:overworld".into(), Dimension::Overworld);
+
+        let level = LevelDat {
+            custom_boss_events: CustomBossEvents {},
+            data_packs: DataPacks {
+                disabled: vec![],
+                enabled: vec![],
+            },
+            dragon_fight: DragonFight {
+                gateways: vec![0, 1, 2],
+                dragon_killed: false,
+                needs_state_scanning: false,
+                previously_killed: false,
+            },
+            game_rules,
+            version: VersionInfo {
+                id: 3465,
+                name: "1.20.1".into(),
+                series: "main".into(),
+                snapshot: 0,
+            },
+            world_gen_settings: WorldGenSettings {
+                dimensions,
+                bonus_chest: false,
+                generate_features: true,
+                seed: 1234,
+            },
+            scheduled_events: ScheduledEvents {},
+            server_brands: ServerBrands::from(vec!["vanilla".to_string()]),
+
+            allow_commands: true,
+
+            border_center_x: 0.0,
+            border_center_z: 0.0,
+            border_damage_per_block: 0.0,
+            border_safe_zone: 0.0,
+            border_size: 60_000_000.0,
+            border_size_lerp_target: 60_000_000.0,
+            border_size_lerp_time: 0,
+            border_warning_blocks: 5,
+            border_warning_time: 15,
+
+            clear_weather_time: 0,
+            data_version: 3465,
+            day_time: 0,
+            difficulty: 2,
+            difficulty_locked: false,
+            game_type: 0,
+            hardcore: false,
+            initialized: true,
+            last_played: 0,
+            level_name: "test".into(),
+            raining: false,
+            rain_time: 0,
+            spawn_angle: 0.0,
+            spawn_x: 0,
+            spawn_y: 64,
+            spawn_z: 0,
+            thundering: false,
+            thunder_time: 0,
+            time: 0,
+            version_id: 3465,
+            wandering_trader_spawn_chance: 25,
+            wandering_trader_spawn_delay: 1200,
+            was_modded: false,
+        };
+
+        let result = create_nbt(&level, "target");
+        assert!(result.is_ok());
     }
 }
+
 /// Test for player.rs
 #[cfg(test)]
 mod player_data_test {