Does anyone have an idea for a new level for my teach-people-to-program game?

Thanks everyone for the feedback on Peanutty.

I'm trying to come up with ideas for new levels that will engage people with the site and encourage them to start playing around with the code.

If anyone has an idea for a good physics-based puzzle I'd love to hear it.

You can see the existing levels at http://peanutty.org (clickable link below - it only works in Chrome right now).

Thanks in advance for the ideas.