I tried The Impossible Game. It gave me a headache. The only other one I've tried isn't a game; it's one of those dealiehicks that helps you fine tune your TV's picture.
Decent indie games are so hard to find though... We also DL'd Avatour Vegas, which is basically your avatar walking the streets of ... well, Las Vegas.
You can also drive, boat, & fly across the map.
Avatar Lazer Wars is probably the best I've seen so far... There are also a few minecraft knock-offs that The Boy & cousins play occasionally.