I recently posted my first app to the app store. It is just a simple classic asteroids-style arcade game. Very small (currently 73k), free, no ads. It was really just for a learning experience. It seems to work well on my Windows 8.1 box, and also not too bad on my Surface RT (1st generation). I actually find it a bit addicting. But, because of the way I did the loop, I have some question as to how it will perform on other devices. If anyone gets a chance to try it out and let me know if it works okay, I'd appreciate it. I called it "Space Cleanup".