I love Universe Sandbox, honetly I could play it for days, but when I'm waiting for a friend somewhere, riding in the car, or any other long and boring task on the go, I can't play Universe Sandbox, and Angry Birds get boring believe it or not, after you beat it 8 times. I would LOVE to see a mobile app. I have an iPod Touch and a Droid2 Global, and my family has an iPad, so it would have to be on all systems. A free and paid version would be cool too. And seeing the stuff that gets put out by this company, I know it would top the charts in a week.