diff --git a/src/game.rs b/src/game.rs
index 76f03c2..80cec76 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -270,7 +270,7 @@ fn keyboard_input_system(
 fn character_particle_effect_system(
 	mut characters: Query<(&CharacterId, &Transform, &CharacterColor)>,
     mut particle_effect: ResMut<crate::particle_effect::ParticleEffectResource>,
-	mut level_query: Query<(&SelectedCharacterId)>,
+	mut level_query: Query<&SelectedCharacterId>,
 ) {
 	if let Ok(selected_character_id) = level_query.get_single_mut() {
 		if let Some(selected_character_id) = &selected_character_id.0 {
@@ -308,6 +308,7 @@ fn move_camera(
 	mut camera_query: Query<(&Camera, &mut Transform, &GlobalTransform)>,
 	characters: Query<(&CharacterId, &Transform), Without<Camera>>,
 	level_query: Query<&SelectedCharacterId>,
+	time: Res<Time>,
 ) {
 	const MARGIN: f32 = 128.0;
 
@@ -324,6 +325,8 @@ fn move_camera(
 					.world_to_viewport(camera_global_transform, transform.translation)
 					.unwrap();
 				let size = camera.logical_viewport_size().unwrap();
+
+				// force camera to be within margin
 				if pos.x < MARGIN {
 					camera_transform.translation.x += pos.x - MARGIN;
 				}
diff --git a/src/particle_effect.rs b/src/particle_effect.rs
index 42afdc0..902d130 100644
--- a/src/particle_effect.rs
+++ b/src/particle_effect.rs
@@ -6,7 +6,7 @@ pub const POOL_COUNT: usize = 100;
 
 pub const MIN_VELOCITY: f32 = 10.0;
 pub const MAX_VELOCITY: f32 = 100.0;
-pub const VELOCITY_SCALE: f32 = 0.1;
+// pub const VELOCITY_SCALE: f32 = 0.1;
 pub const PARTICLE_EFFECT_RADIUS: f32 = 70.0;
 
 pub struct ParticleEffectPlugin;