diff --git a/src/actor.rs b/src/actor.rs
index c6acd05..aee46d2 100644
--- a/src/actor.rs
+++ b/src/actor.rs
@@ -1,10 +1,5 @@
 use bevy::prelude::*;
-
-#[allow(unused)] pub const OXYGEN_USE_KG_PER_S: f32 = 1e-5;
-#[allow(unused)] pub const OXY_S: f32 = OXYGEN_USE_KG_PER_S;
-#[allow(unused)] pub const OXY_M: f32 = OXYGEN_USE_KG_PER_S * 60.0;
-#[allow(unused)] pub const OXY_H: f32 = OXYGEN_USE_KG_PER_S * 60.0 * 60.0;
-#[allow(unused)] pub const OXY_D: f32 = OXYGEN_USE_KG_PER_S * 60.0 * 60.0 * 24.0;
+use crate::nature;
 
 pub struct ActorPlugin;
 impl Plugin for ActorPlugin {
@@ -55,8 +50,8 @@ impl Default for Suit { fn default() -> Self { SUIT_SIMPLE } }
 const SUIT_SIMPLE: Suit = Suit {
     power: 1e5,
     power_max: 1e5,
-    oxygen: OXY_D,
-    oxygen_max: OXY_D,
+    oxygen: nature::OXY_D,
+    oxygen_max: nature::OXY_D,
 };
 
 pub fn update(
@@ -72,7 +67,7 @@ pub fn update(
             lifeform.adrenaline_jolt = 0.0
         }
         lifeform.adrenaline = (lifeform.adrenaline - 0.0001 + lifeform.adrenaline_jolt * 0.01).clamp(0.0, 1.0);
-        suit.oxygen = (suit.oxygen - OXY_S*d).clamp(0.0, 1.0);
+        suit.oxygen = (suit.oxygen - nature::OXY_S*d).clamp(0.0, 1.0);
     }
 }
 
diff --git a/src/nature.rs b/src/nature.rs
index bffd1d5..4c1ebe7 100644
--- a/src/nature.rs
+++ b/src/nature.rs
@@ -2,6 +2,12 @@
 // nobody cares how it works, but I guess we need it as an ingredient for
 // the universe *sigh* so here we go.
 
+pub const OXYGEN_USE_KG_PER_S: f32 = 1e-5;
+pub const OXY_S: f32 = OXYGEN_USE_KG_PER_S;
+pub const OXY_M: f32 = OXYGEN_USE_KG_PER_S * 60.0;
+pub const OXY_H: f32 = OXYGEN_USE_KG_PER_S * 60.0 * 60.0;
+pub const OXY_D: f32 = OXYGEN_USE_KG_PER_S * 60.0 * 60.0 * 24.0;
+
 pub fn star_color_index_to_rgb(color_index: f32) -> (f32, f32, f32) {
     let temperature = 4600.0 * ((1.0 / (0.92 * color_index + 1.7)) + (1.0 / (0.92 * color_index + 0.62)));
 
diff --git a/src/settings.rs b/src/settings.rs
index 13318f3..57027e3 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -26,7 +26,7 @@ pub struct Settings {
 impl Default for Settings {
     fn default() -> Self {
         Settings {
-            mute_sfx: true,
+            mute_sfx: false,
             mute_music: true,
             volume_sfx: 100,
             volume_music: 100,
diff --git a/src/world.rs b/src/world.rs
index 0e5d74d..54c150f 100644
--- a/src/world.rs
+++ b/src/world.rs
@@ -71,7 +71,7 @@ pub fn setup(
         actor::Actor::default(),
         actor::LifeForm::default(),
         actor::Suit {
-            oxygen: actor::OXY_M,
+            oxygen: nature::OXY_M,
             ..default()
         }
     ));