Add terrain hit effects, progressive damage component, and update collectable signals

scripts/components/bullet_component.gd

@@ -3,6 +3,8 @@ extends Node
 
 @export var root: Node2D
 @export var area2d: Area2D
+@export var hit_terrain_fx: TerrainHitFx
+@export var bullet_sprite: Sprite2D
 
 
 func _ready() -> void:
@@ -10,9 +12,26 @@ func _ready() -> void:
 	area2d.area_entered.connect(on_area2d_area_entered)
 
 
-func on_area2d_body_entered(_body: Node2D) -> void:
+
+func on_area2d_body_entered(body: Node2D) -> void:
+	if body is TileMapLayer:
+		if bullet_sprite:
+			bullet_sprite.visible = false
+		play_terrain_hit_fx()
+		return
+
 	root.queue_free()
 
 
 func on_area2d_area_entered(_area: Area2D) -> void:
 	root.queue_free()
+
+
+
+func play_terrain_hit_fx() -> void:
+	if not hit_terrain_fx:
+		return
+
+	await hit_terrain_fx.trigger_fx()
+
+	root.queue_free()