sixit

As sterile and minimalist as you can get. A single pin (invisible on the screenshot) on the left is all you have. And yes, it's possible.

Hopefully you won't be by the time you earn your Gold Star!

A medieval military siege engine for hurling heavy missiles.
This was the classic device for throwing rocks at an enemy; a big boys' catapult. It consisted of a long pivoted arm with a sling at one end and a heavy counterweight at the other.