Neat, but what's different in the 5th version, the support for iPad and iPod Touch?
Please change the iAtoms logo in the first pic, it would be reason for me to skip the game instantly while browsing through the app store, sorry.
Small, decent, soft lines without default layer effects and noise would look much better IMO. (Even though the colors represent the game's parties, you could try a brighter look of all circles.)