Prism 3D is a great game that uses your Android phone's accelerometer to track a beach ball as it bounces down a set of 3D tiles, and your goal is to keep it from falling by the wayside. It's way harder than it sounds, which to me is a big plus as it keeps the replay value high. The game has beautiful graphics, is incredibly smooth on my Nexus One (I can only imagine it on a Galaxy S or Droid X), and entertaining as all get-out. Add in an infinite mode for you guys who are good at this one, and a level editor for those of us who aren't, and I think you have a real winner here.
After the break there's a video of the game in action, and the download link, check this one out! [Hyperbees] Thanks Nicole!