Check out Ms Particle-Man! This game by Michael Falk (Picobots) is full of gorgeous blippy retro goodness.

By using ExEn, Michael has made Ms Particle-Man available for iOS (App Store link) and as a browser-based game (website link). Michael also has the game running on Windows and Xbox 360.

ExEn lets you build and run your XNA (Windows, Xbox 360, Windows Phone) games on Silverlight, iOS and Android.