I won't mince words here: I've seen and played a lot of iOS games, and when I first saw Casey's Contraptions back at GDC this year (which is out today for the first time on the iPad), I thought it was the most impressive iOS game I'd ever seen.
The Incredible Machine is what jumps to mind to describe it, but really, this game is more than that -- it's a full engine of physics gameplay. The idea is that you're presented with over 70 included puzzles by young Casey, and then you have to solve them with various items, which span everything from punching gloves to darts and RC cars. After that, you can also create your own levels and even
