Unfortunately, I missed Eliss the first time around, but I won't make the same mistake this time. It's a game designed by a French and Portugese graphic designer named Steph Thirion, and it's sort of an abstract multitouch puzzler -- you can pull and push together differently colored planets all floating around in a sort of space-like environment, with some groovy synth sound effects and music cuts to back up the gameplay. The game got nominated for an IGF award, and for anyone interested in fun puzzlers (not to mention the possibilities of multitouch in gaming), it's a must-see.
I say "the first time around," because it's been on the App Store for a while now, but the game just got updated to version 1.1, and the main tweak is in the difficulty -- there are now 25 levels instead of 20, and the curve has been adjusted to make moving through the stages a little smoother. And the game got a price drop, too -- you can pick it up for a mere $3.00. As I said, definitely worth it to get a little multitouch practice in for what might be the future of gaming.