diff --git a/src/main.rs b/src/main.rs
index 17ebc40..ffc6cd0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,11 +2,8 @@
 
 pub mod components;
 pub mod constants;
-mod map;
 pub mod resources;
 mod sidebar;
-mod sound;
-mod sound_effects;
 mod state;
 pub mod systems;
 pub mod vga_color;
@@ -16,10 +13,8 @@ use components::{
     monster::{color_for_kind, glyphs_for_kind, ticks_for_kind, MonsterKind},
     Monster, Player, Position, Renderable,
 };
-use map::{Map, TileType};
-use resources::{Clock, LevelNumber, ShowDebugInfo, Stats};
-use sound::SoundSystem;
-use sound_effects::SoundEffects;
+use resources::map::TileType;
+use resources::{Clock, LevelNumber, Map, ShowDebugInfo, SoundEffects, SoundSystem, Stats};
 use specs::prelude::*;
 use state::State;
 use std::time::Instant;
diff --git a/src/map.rs b/src/resources/map.rs
similarity index 100%
rename from src/map.rs
rename to src/resources/map.rs
diff --git a/src/resources/mod.rs b/src/resources/mod.rs
index 59ff897..bc444d3 100644
--- a/src/resources/mod.rs
+++ b/src/resources/mod.rs
@@ -1,3 +1,11 @@
+pub mod map;
+pub mod sound_effects;
+pub mod sound_system;
+
+pub use map::Map;
+pub use sound_effects::SoundEffects;
+pub use sound_system::SoundSystem;
+
 use crate::constants::CLOCK_PERIOD;
 use std::time::{Duration, Instant};
 
diff --git a/src/sound_effects.rs b/src/resources/sound_effects.rs
similarity index 97%
rename from src/sound_effects.rs
rename to src/resources/sound_effects.rs
index d096880..d704ee2 100644
--- a/src/sound_effects.rs
+++ b/src/resources/sound_effects.rs
@@ -2,7 +2,9 @@ use std::{array, iter, time::Duration};
 
 use bracket_lib::random::RandomNumberGenerator;
 
-use crate::sound::{Sound, SoundEffect, SoundEffectSamples, SoundSystem, SoundType};
+use crate::resources::sound_system::{
+    Sound, SoundEffect, SoundEffectSamples, SoundSystem, SoundType,
+};
 
 pub struct SoundEffects {
     pub startup: SoundEffectSamples,
diff --git a/src/sound.rs b/src/resources/sound_system.rs
similarity index 98%
rename from src/sound.rs
rename to src/resources/sound_system.rs
index 35c8497..73cf1b8 100644
--- a/src/sound.rs
+++ b/src/resources/sound_system.rs
@@ -34,6 +34,12 @@ pub struct SoundSystem {
     _stream: Stream,
 }
 
+impl Default for SoundSystem {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl SoundSystem {
     pub fn new() -> Self {
         let host = cpal::default_host();
diff --git a/src/state.rs b/src/state.rs
index 94d385c..dc26c9c 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -2,10 +2,8 @@ use std::time::{Duration, Instant};
 
 use crate::components::monster::damage_for_kind;
 use crate::components::{Monster, Player, Position, Renderable};
-use crate::map::{Map, TileType};
-use crate::resources::{Clock, ShowDebugInfo, Stats};
-use crate::sound::SoundSystem;
-use crate::sound_effects::SoundEffects;
+use crate::resources::map::TileType;
+use crate::resources::{Clock, Map, ShowDebugInfo, SoundEffects, SoundSystem, Stats};
 use crate::systems::MonsterMotion;
 use crate::{constants::*, sidebar};
 use bracket_lib::prelude::*;
diff --git a/src/systems/monster_motion.rs b/src/systems/monster_motion.rs
index ed25367..52d2f2f 100644
--- a/src/systems/monster_motion.rs
+++ b/src/systems/monster_motion.rs
@@ -3,8 +3,8 @@ use crate::{
         monster::{self, damage_for_kind, ticks_for_kind},
         Monster, Position, Renderable,
     },
-    map::{Map, TileType},
-    resources::{Clock, Stats},
+    resources::map::TileType,
+    resources::{Clock, Map, Stats},
 };
 use bracket_lib::{prelude::*, random::RandomNumberGenerator};
 use specs::prelude::*;