The moving platform in level 1 wnow moves up and down. I finished level one.

tile_map_layer.gd

@@ -4,19 +4,27 @@ var moving_up :bool = true
 var speed :float = 50.0
 var distance_moved :float = 0.0
 var moving = false
+var movement = speed
+var moving_down :bool = false
+
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
 	if moving:
-		var movement = speed * delta
-		
+		var delta_movement = movement * delta
 		if moving_up:
-			position.y -= movement
-			distance_moved += movement
+			position.y -= delta_movement
+			distance_moved += delta_movement
 			if distance_moved >= 479.7:
 				moving_up = false
+				
+		else:
+			position.y += delta_movement
+			distance_moved -= delta_movement
+			if distance_moved <= 0:
+				moving_up = true
 
 
 func _on_platform_body_entered(body: Node2D) -> void:
-	print(body)
-	moving = true
+	if body.name == "player":
+		moving = true