Fix vertical movement sprite in Dodge the Creeps (#1006)

Using rotation in the player node instead of flipping vertically, by doing so the trail is also rotated.

2d/dodge_the_creeps/Player.gd

@@ -37,11 +37,12 @@ func _process(delta):
 		$AnimatedSprite2D.flip_h = velocity.x < 0
 	elif velocity.y != 0:
 		$AnimatedSprite2D.animation = &"up"
-		$AnimatedSprite2D.flip_v = velocity.y > 0
-		$Trail.rotation = PI if velocity.y > 0 else 0
+		rotation = PI if velocity.y > 0 else 0
+
 
 func start(pos):
 	position = pos
+	rotation = 0
 	show()
 	$CollisionShape2D.disabled = false