I will introduce you a strange but addictive space (particle) arcade iPhone game from the Pangea, also known as with their Enigmo game (3D puzzle) which has won the Best iPhone Game award in 2008 by Apple.
It is a strange game but I will try to explain how it works. There is an orb and you try to convert blue cosmic strings (which also move around) to red by moving your finger in a certain period of time. It looks easy but not actually.
The graphics are really powerful and the gameplay is high quality. Pangea software games are really cheap nowadays for introduction purposes of antimatter game. Only $0.99 at appstore including the famous Enigmo.