added sprites for grenade and bullet; tilemap with collisions; explosion effect

scripts/grenade.gd

@@ -3,6 +3,9 @@ extends RigidBody2D
 
 var timer = Timer.new()
 
+@onready var animated_sprite_2d: AnimatedSprite2D = $AnimatedSprite2D
+@onready var sprite_2d: Sprite2D = $Sprite2D
+
 func _ready() -> void:
 	add_child(timer)
 	timer.wait_time = 2.0
@@ -12,6 +15,9 @@ func _ready() -> void:
 
 func explode() -> void:
 	print("kaboom!")
+	sprite_2d.visible = false
+	animated_sprite_2d.play("explode")
+	await animated_sprite_2d.animation_finished
 	self.queue_free()
 
 func _on_body_entered(body: Node) -> void: