diff --git a/space-crush-app/src/components/mod.rs b/space-crush-app/src/components/mod.rs
deleted file mode 100644
index f03f97d..0000000
--- a/space-crush-app/src/components/mod.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-mod player_visual;
-
-pub use player_visual::PlayerVisual;
diff --git a/space-crush-app/src/components/player_visual.rs b/space-crush-app/src/components/player_visual.rs
deleted file mode 100644
index bf2c403..0000000
--- a/space-crush-app/src/components/player_visual.rs
+++ /dev/null
@@ -1,12 +0,0 @@
-use glc::vector::Vector4f;
-use serde::{Deserialize, Serialize};
-use specs::{Component, HashMapStorage};
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct PlayerVisual {
-    pub color: Vector4f,
-}
-
-impl Component for PlayerVisual {
-    type Storage = HashMapStorage<Self>;
-}
diff --git a/space-crush-app/src/lib.rs b/space-crush-app/src/lib.rs
index fc71f1b..6971566 100644
--- a/space-crush-app/src/lib.rs
+++ b/space-crush-app/src/lib.rs
@@ -1,10 +1,9 @@
-pub mod components;
-pub mod constants;
-pub mod error;
-pub mod misc;
-pub mod render;
-pub mod resources;
-pub mod systems;
+mod constants;
+mod error;
+mod misc;
+mod render;
+mod resources;
+mod systems;
 
 use specs::{Dispatcher, DispatcherBuilder, World};
 
diff --git a/space-crush-app/src/main.rs b/space-crush-app/src/main.rs
index d68733c..31a6d5e 100644
--- a/space-crush-app/src/main.rs
+++ b/space-crush-app/src/main.rs
@@ -51,17 +51,15 @@ fn run(vfs: Vfs) -> Result<(), Error> {
 
 fn create_world(world: &mut World) {
     use glc::vector::{Vector2f, Vector4f};
-    use space_crush_app::{components::PlayerVisual, misc::PersistWorld};
     use space_crush_common::{
         components::{Owned, Planet, Player, Position, Ship, ShipType, Velocity},
-        misc::Persistence,
+        misc::{PersistWorld, Persistence},
     };
     use specs::{saveload::MarkedBuilder, Builder};
 
     let player1 = world
         .create_entity()
-        .with(Player {})
-        .with(PlayerVisual {
+        .with(Player {
             color: Vector4f::new(0.0, 0.5, 1.0, 0.1),
         })
         .build();
@@ -107,8 +105,7 @@ fn create_world(world: &mut World) {
 
 fn load_world(world: &mut World, path: &str) -> Result<bool, Error> {
     use serde_json::de::{Deserializer, IoRead};
-    use space_crush_app::misc::PersistWorld;
-    use space_crush_common::misc::{Persistence, WorldHelper};
+    use space_crush_common::misc::{PersistWorld, Persistence, WorldHelper};
 
     PersistWorld::setup(world);
 
@@ -128,8 +125,7 @@ fn load_world(world: &mut World, path: &str) -> Result<bool, Error> {
 
 fn save_world(world: &mut World, path: &str) -> Result<(), Error> {
     use serde_json::Serializer;
-    use space_crush_app::misc::PersistWorld;
-    use space_crush_common::misc::WorldHelper;
+    use space_crush_common::misc::{PersistWorld, WorldHelper};
 
     let vfs = world.resource::<Vfs>()?;
     let mut file = vfs.join(path)?.create_file()?;
diff --git a/space-crush-app/src/misc/mod.rs b/space-crush-app/src/misc/mod.rs
index 252fa5d..70eb8c3 100644
--- a/space-crush-app/src/misc/mod.rs
+++ b/space-crush-app/src/misc/mod.rs
@@ -6,4 +6,4 @@ mod world;
 pub use events::{Events, KeyboardEvent, MouseButton, MouseEvent, VirtualKeyCode, WindowEvent};
 pub use text::{Text, TextCache, TextManager};
 pub use window::Window;
-pub use world::{PersistWorld, WorldHelper};
+pub use world::WorldHelper;
diff --git a/space-crush-app/src/misc/world.rs b/space-crush-app/src/misc/world.rs
index 909fcbe..7348253 100644
--- a/space-crush-app/src/misc/world.rs
+++ b/space-crush-app/src/misc/world.rs
@@ -5,31 +5,10 @@ use glc::{
     shader::{Program, Shader, Type},
     texture::{Data, FilterMag, FilterMin, Target, Texture, Wrap},
 };
-use space_crush_common::{
-    components::{Owned, Planet, Player, Position, Ship, Velocity},
-    misc::{Persistence, Vfs},
-};
-use specs::{saveload::SimpleMarker, World};
-
-use crate::{components::PlayerVisual, Error};
-
-/* PersistWorld */
-
-pub struct PersistWorld;
-pub struct PersistWorldMarker;
-
-impl Persistence for PersistWorld {
-    type Marker = SimpleMarker<PersistWorldMarker>;
-    type Components = (
-        Position,
-        Velocity,
-        Planet,
-        Ship,
-        Owned,
-        Player,
-        PlayerVisual,
-    );
-}
+use space_crush_common::misc::Vfs;
+use specs::World;
+
+use crate::Error;
 
 /* WorldHelper */
 
diff --git a/space-crush-app/src/render/planets.rs b/space-crush-app/src/render/planets.rs
index 0296da0..22c9168 100644
--- a/space-crush-app/src/render/planets.rs
+++ b/space-crush-app/src/render/planets.rs
@@ -6,13 +6,12 @@ use glc::{
     vector::Vector4f,
 };
 use space_crush_common::{
-    components::{Owned, Planet, Position},
+    components::{Owned, Planet, Player, Position},
     misc::LogResult,
 };
 use specs::{prelude::*, ReadExpect, ReadStorage, System, World};
 
 use crate::{
-    components::PlayerVisual,
     constants::{PLAYER_COLOR_DEFAULT, UNIFORM_BUFFER_INDEX_CAMERA, UNIFORM_BUFFER_INDEX_UNIFORM},
     misc::WorldHelper,
     resources::Geometry,
@@ -60,7 +59,7 @@ pub struct PlanetsData<'a> {
     position: ReadStorage<'a, Position>,
     planet: ReadStorage<'a, Planet>,
     owned: ReadStorage<'a, Owned>,
-    player_visual: ReadStorage<'a, PlayerVisual>,
+    player: ReadStorage<'a, Player>,
 }
 
 impl<'a> System<'a> for Planets {
@@ -72,7 +71,7 @@ impl<'a> System<'a> for Planets {
             position,
             planet,
             owned,
-            player_visual,
+            player,
         } = data;
 
         gl::enable(gl::BLEND);
@@ -86,7 +85,7 @@ impl<'a> System<'a> for Planets {
             let p_y = p.pos.y;
             let s = p.size;
 
-            let c = match owned.and_then(|owned| player_visual.get(owned.owner)) {
+            let c = match owned.and_then(|owned| player.get(owned.owner)) {
                 Some(pv) => &pv.color,
                 None => &*PLAYER_COLOR_DEFAULT,
             };
diff --git a/space-crush-app/src/render/ships.rs b/space-crush-app/src/render/ships.rs
index ae897c4..c03ffe1 100644
--- a/space-crush-app/src/render/ships.rs
+++ b/space-crush-app/src/render/ships.rs
@@ -6,13 +6,12 @@ use glc::{
     vector::Vector4f,
 };
 use space_crush_common::{
-    components::{Owned, Position, Ship, ShipType, Velocity},
+    components::{Owned, Player, Position, Ship, ShipType, Velocity},
     misc::LogResult,
 };
 use specs::{prelude::*, ReadExpect, ReadStorage, System, World};
 
 use crate::{
-    components::PlayerVisual,
     constants::{PLAYER_COLOR_DEFAULT, UNIFORM_BUFFER_INDEX_CAMERA, UNIFORM_BUFFER_INDEX_UNIFORM},
     misc::WorldHelper,
     resources::Geometry,
@@ -67,7 +66,7 @@ pub struct ShipsData<'a> {
     velocity: ReadStorage<'a, Velocity>,
     ship: ReadStorage<'a, Ship>,
     owned: ReadStorage<'a, Owned>,
-    player_visual: ReadStorage<'a, PlayerVisual>,
+    player: ReadStorage<'a, Player>,
 }
 
 impl<'a> System<'a> for Ships {
@@ -80,7 +79,7 @@ impl<'a> System<'a> for Ships {
             velocity,
             ship,
             owned,
-            player_visual,
+            player,
         } = data;
 
         gl::enable(gl::BLEND);
@@ -95,7 +94,7 @@ impl<'a> System<'a> for Ships {
                 ShipType::Transporter => BindGuard::new(&self.texture_transporter),
             };
 
-            let c = match owned.and_then(|owned| player_visual.get(owned.owner)) {
+            let c = match owned.and_then(|owned| player.get(owned.owner)) {
                 Some(pv) => &pv.color,
                 None => &*PLAYER_COLOR_DEFAULT,
             };
diff --git a/space-crush-common/src/components/player.rs b/space-crush-common/src/components/player.rs
index da422b8..e9998d1 100644
--- a/space-crush-common/src/components/player.rs
+++ b/space-crush-common/src/components/player.rs
@@ -1,9 +1,12 @@
+use glc::vector::Vector4f;
 use serde::{Deserialize, Serialize};
-use specs::{Component, NullStorage};
+use specs::{Component, HashMapStorage};
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize)]
-pub struct Player {}
+pub struct Player {
+    pub color: Vector4f,
+}
 
 impl Component for Player {
-    type Storage = NullStorage<Self>;
+    type Storage = HashMapStorage<Self>;
 }
diff --git a/space-crush-common/src/misc/mod.rs b/space-crush-common/src/misc/mod.rs
index 8a7479a..279b132 100644
--- a/space-crush-common/src/misc/mod.rs
+++ b/space-crush-common/src/misc/mod.rs
@@ -1,9 +1,11 @@
 mod log;
 mod log_result;
+mod persistence;
 mod vfs;
 mod world;
 
 pub use self::log::init as init_logger;
 pub use self::vfs::{Vfs, VfsError};
 pub use log_result::LogResult;
-pub use world::{Persistence, WorldHelper};
+pub use persistence::{PersistWorld, Persistence};
+pub use world::WorldHelper;
diff --git a/space-crush-common/src/misc/persistence.rs b/space-crush-common/src/misc/persistence.rs
new file mode 100644
index 0000000..ec5d6d2
--- /dev/null
+++ b/space-crush-common/src/misc/persistence.rs
@@ -0,0 +1,143 @@
+use serde::{de::Deserializer, ser::Serializer};
+use specs::{
+    error::NoError,
+    saveload::{ConvertSaveload, DeserializeComponents, Marker, SerializeComponents, SimpleMarker},
+    Component, Entities, ReadStorage, World, WorldExt, Write, WriteStorage,
+};
+
+use crate::components::{Owned, Planet, Player, Position, Ship, Velocity};
+
+/* PersistWorld */
+
+pub struct PersistWorld;
+pub struct PersistWorldMarker;
+
+impl Persistence for PersistWorld {
+    type Marker = SimpleMarker<PersistWorldMarker>;
+    type Components = (Position, Velocity, Planet, Ship, Owned, Player);
+}
+
+/* Persistence */
+
+pub trait Persistence {
+    type Marker: Marker;
+    type Components: PersistenceComponents<Self::Marker>;
+
+    fn setup(world: &mut World)
+    where
+        <Self::Marker as Component>::Storage: Default,
+        <Self::Marker as Marker>::Allocator: Default,
+    {
+        world.register::<Self::Marker>();
+        world.insert(<Self::Marker as Marker>::Allocator::default());
+    }
+
+    fn serialize<S>(&self, world: &World, serializer: S) -> Result<(), S::Error>
+    where
+        S: Serializer,
+    {
+        Self::Components::serialize(world, serializer)
+    }
+
+    fn deserialize<'de, D>(&self, world: &World, deserializer: D) -> Result<(), D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        Self::Components::deserialize(world, deserializer)
+    }
+}
+
+/* PersistenceComponents */
+
+pub trait PersistenceComponents<M>
+where
+    M: Marker,
+{
+    fn serialize<S>(world: &World, serializer: S) -> Result<(), S::Error>
+    where
+        S: Serializer;
+
+    fn deserialize<'de, D>(world: &World, deserializer: D) -> Result<(), D::Error>
+    where
+        D: Deserializer<'de>;
+}
+
+macro_rules! define_persistence_components {
+    ($($T:ident),*) => {
+        #[allow(non_snake_case)]
+        impl<M $(,$T)+> PersistenceComponents<M> for ($($T,)+)
+        where
+            M: Marker,
+            M::Allocator: Default,
+            $($T: Component + ConvertSaveload<M, Error = NoError>,)+
+        {
+            fn serialize<S>(world: &World, serializer: S) -> Result<(), S::Error>
+            where
+                S: Serializer,
+            {
+                let (
+                    entities,
+                    mut marker,
+                    mut allocator,
+                    $($T,)+
+                ) = world.system_data::<(
+                    Entities,
+                    WriteStorage<M>,
+                    Write<M::Allocator>,
+                    $(ReadStorage<$T>,
+                )+)>();
+
+                SerializeComponents::<NoError, M>::serialize_recursive
+                    (&($($T,)+),
+                    &entities,
+                    &mut marker,
+                    &mut allocator,
+                    serializer,
+                )?;
+
+                Ok(())
+            }
+
+            fn deserialize<'de, D>(world: &World, deserializer: D) -> Result<(), D::Error>
+            where
+                D: Deserializer<'de>,
+            {
+                let (
+                    entities,
+                    mut marker,
+                    mut allocator,
+                    $($T,)+
+                ) = world.system_data::<(
+                    Entities,
+                    WriteStorage<M>,
+                    Write<M::Allocator>,
+                    $(WriteStorage<$T>,)+
+                )>();
+
+                DeserializeComponents::<NoError, M>::deserialize(
+                    &mut ($($T,)+),
+                    &entities,
+                    &mut marker,
+                    &mut allocator,
+                    deserializer,
+                )
+            }
+        }
+    }
+}
+
+define_persistence_components!(T1);
+define_persistence_components!(T1, T2);
+define_persistence_components!(T1, T2, T3);
+define_persistence_components!(T1, T2, T3, T4);
+define_persistence_components!(T1, T2, T3, T4, T5);
+define_persistence_components!(T1, T2, T3, T4, T5, T6);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14);
+define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15);
diff --git a/space-crush-common/src/misc/world.rs b/space-crush-common/src/misc/world.rs
index 631ada9..e42cae9 100644
--- a/space-crush-common/src/misc/world.rs
+++ b/space-crush-common/src/misc/world.rs
@@ -3,14 +3,12 @@ use std::any::type_name;
 use serde::{de::Deserializer, ser::Serializer};
 use shred::{Fetch, FetchMut, Resource};
 use shrev::{Event, EventChannel, ReaderId};
-use specs::{
-    error::NoError,
-    saveload::{ConvertSaveload, DeserializeComponents, Marker, SerializeComponents},
-    Component, Entities, ReadStorage, World, WorldExt, Write, WriteStorage,
-};
+use specs::World;
 
 use crate::Error;
 
+use super::Persistence;
+
 /* WorldHelper */
 
 pub trait WorldHelper {
@@ -77,128 +75,3 @@ impl WorldHelper for World {
         persistence.deserialize(self, deserializer)
     }
 }
-
-/* Persistence */
-
-pub trait Persistence {
-    type Marker: Marker;
-    type Components: PersistenceComponents<Self::Marker>;
-
-    fn setup(world: &mut World)
-    where
-        <Self::Marker as Component>::Storage: Default,
-        <Self::Marker as Marker>::Allocator: Default,
-    {
-        world.register::<Self::Marker>();
-        world.insert(<Self::Marker as Marker>::Allocator::default());
-    }
-
-    fn serialize<S>(&self, world: &World, serializer: S) -> Result<(), S::Error>
-    where
-        S: Serializer,
-    {
-        Self::Components::serialize(world, serializer)
-    }
-
-    fn deserialize<'de, D>(&self, world: &World, deserializer: D) -> Result<(), D::Error>
-    where
-        D: Deserializer<'de>,
-    {
-        Self::Components::deserialize(world, deserializer)
-    }
-}
-
-/* PersistenceComponents */
-
-pub trait PersistenceComponents<M>
-where
-    M: Marker,
-{
-    fn serialize<S>(world: &World, serializer: S) -> Result<(), S::Error>
-    where
-        S: Serializer;
-
-    fn deserialize<'de, D>(world: &World, deserializer: D) -> Result<(), D::Error>
-    where
-        D: Deserializer<'de>;
-}
-
-macro_rules! define_persistence_components {
-    ($($T:ident),*) => {
-        #[allow(non_snake_case)]
-        impl<M $(,$T)+> PersistenceComponents<M> for ($($T,)+)
-        where
-            M: Marker,
-            M::Allocator: Default,
-            $($T: Component + ConvertSaveload<M, Error = NoError>,)+
-        {
-            fn serialize<S>(world: &World, serializer: S) -> Result<(), S::Error>
-            where
-                S: Serializer,
-            {
-                let (
-                    entities,
-                    mut marker,
-                    mut allocator,
-                    $($T,)+
-                ) = world.system_data::<(
-                    Entities,
-                    WriteStorage<M>,
-                    Write<M::Allocator>,
-                    $(ReadStorage<$T>,
-                )+)>();
-
-                SerializeComponents::<NoError, M>::serialize_recursive
-                    (&($($T,)+),
-                    &entities,
-                    &mut marker,
-                    &mut allocator,
-                    serializer,
-                )?;
-
-                Ok(())
-            }
-
-            fn deserialize<'de, D>(world: &World, deserializer: D) -> Result<(), D::Error>
-            where
-                D: Deserializer<'de>,
-            {
-                let (
-                    entities,
-                    mut marker,
-                    mut allocator,
-                    $($T,)+
-                ) = world.system_data::<(
-                    Entities,
-                    WriteStorage<M>,
-                    Write<M::Allocator>,
-                    $(WriteStorage<$T>,)+
-                )>();
-
-                DeserializeComponents::<NoError, M>::deserialize(
-                    &mut ($($T,)+),
-                    &entities,
-                    &mut marker,
-                    &mut allocator,
-                    deserializer,
-                )
-            }
-        }
-    }
-}
-
-define_persistence_components!(T1);
-define_persistence_components!(T1, T2);
-define_persistence_components!(T1, T2, T3);
-define_persistence_components!(T1, T2, T3, T4);
-define_persistence_components!(T1, T2, T3, T4, T5);
-define_persistence_components!(T1, T2, T3, T4, T5, T6);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14);
-define_persistence_components!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15);