I found another one that amazingly more complex. Not sure if I like it yet or not, but there are some crazy options. You build robots to do things and you actually control them with arrow keys and stuff.
This game lacks the elegant simplicity of Fantastic Contraptions, but once you get past the unwieldy interface it's got its own charm.
I'm very proud of my claw machine. Trying to figure out how to pilot the thing you've just built is really interesting. The replay is my first test drive of the contraption so you can see me fumbling around trying to pick up the first couple of objects.