Here is a picture of level 4 in action.
To make the platform where it is in the picture, for example, you press down+left on the joystick. I made it like the Game and Watch game Manhole like I said. Mr. Celery is automatically crossing the screen and you need to place the platform under him so he doesn't fall into a hole and lose a life.
Next up, making level 5. But not today. I'm feeling really hot in here. I don't know. I don't feel very good.