diff --git a/src/game/mod.rs b/src/game/mod.rs
new file mode 100644
index 0000000..41e8717
--- /dev/null
+++ b/src/game/mod.rs
@@ -0,0 +1,38 @@
+
+use bevy::prelude::*;
+
+/// Data component for info about the player's current set of cards.
+///
+/// [`Self::capacity`] is the maximum hand size.
+///
+/// [`Self::low_water_mark`] is the threshold for drawing new cards on-room-enter.
+#[derive(Component)]
+pub struct PlayerHand{
+  cards: Vec<Entity>,
+  capacity: u8, 
+  low_water_mark: u8,
+}
+
+pub mod machines {
+
+  use bevy::prelude::*;
+
+  #[derive(Component)]
+  pub struct CuttingMachine;
+
+  #[derive(Component)]
+  pub struct RotatingMachine;
+
+  #[derive(Component)]
+  pub struct FlippingMachine;
+
+  #[derive(Component)]
+  pub struct TransposingMachine;
+}
+
+pub mod consumables {
+  use bevy::prelude::*;
+
+  #[derive(Component)]
+  pub struct Fuel(u32);
+}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 14c8c06..b33dc9d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,6 +3,7 @@ use bevy_inspector_egui::{bevy_egui::EguiPlugin, quick::WorldInspectorPlugin};
 
 mod assets;
 mod card;
+mod game;
 mod resources;
 mod widgets;