It was called iTrio. I've since removed the Lite version from the app store. Its only handicap was that you were limited to easy mode -- to play in regular mode

It was called iTrio. I've since removed the Lite version from the app store. Its only handicap was that you were limited to easy mode -- to play in regular mode you had to buy the full version. You can get a pretty good idea of the app from its site at http://www.itrioapp.com http://www.itrioapp.com. For my upcoming asteroids-inspired game I'm thinking of imposing a time limit -- let the player play for somewhere between 2 to 5 minutes and then it's "game over" and "please buy the full version".