diff --git a/client/src/main.rs b/client/src/main.rs
index 3ba3a91..f5d3dd1 100644
--- a/client/src/main.rs
+++ b/client/src/main.rs
@@ -76,6 +76,7 @@ fn setup_game(
 ) {
     // ball
     commands.spawn((
+        Ball,
         Mesh2d(meshes.add(Circle::new(10.0))),
         MeshMaterial2d(materials.add(Color::srgb(1.0, 0.0, 0.0))),
         Transform::default(),
@@ -85,23 +86,32 @@ fn setup_game(
     let paddle_material = materials.add(Color::WHITE);
     // Player 1
     commands.spawn((
-        // TODO: Marker component for player
-        // Maybe one for each player?
-        // Maybe it can hold the WebSocket, too.
-        // *Maybe* I can have one struct with an Option<Ws> to know which
-        //   player is the local one (the one with a socket).
+        Paddle,
         Mesh2d(paddle_mesh.clone()),
         MeshMaterial2d(paddle_material.clone()),
         Transform::from_xyz(-window.width() / 2.0 + PADDLE_GAP, 0.0, 1.0),
     ));
     // Player 2
     commands.spawn((
+        Paddle,
         Mesh2d(paddle_mesh),
         MeshMaterial2d(paddle_material),
         Transform::from_xyz(window.width() / 2.0 - PADDLE_GAP, 0.0, 1.0),
     ));
 }
 
+#[derive(Component)]
+struct Ball;
+
+/// Marker component for player paddles
+/// 
+/// Maybe one for each player?
+/// Maybe it can hold the WebSocket, too.
+/// *Maybe* I can have one struct with an Option<Ws> to know which
+/// player is the local one (the one with a socket).
+#[derive(Component)]
+struct Paddle;
+
 /// ECS Component to hold the WebSocket. I guess there's going to be a magic
 /// entity that controls the networking.
 #[derive(Component)]