add enemy hitbox and refactor to characterBody2d

scripts/slime.gd

@@ -1,4 +1,4 @@
-extends Node2D
+extends CharacterBody2D
 
 @export var speed = 60
 
@@ -9,7 +9,11 @@ var direction = 1
 @onready var animated_sprite: AnimatedSprite2D = $AnimatedSprite2D
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
+func _physics_process(delta: float) -> void:
+	# Apply gravity
+	if not is_on_floor():
+		velocity += get_gravity() * delta
+	
 	if ray_cast_right.is_colliding():
 		direction = -1
 		animated_sprite.flip_h = true
@@ -19,3 +23,9 @@ func _process(delta: float) -> void:
 		animated_sprite.flip_h = false
 		
 	position.x += direction * speed * delta
+	
+	move_and_slide()
+
+
+func _on_hit_box_killed() -> void:
+	queue_free()