Started out alright, but started to test my patience when I had to try and hit a tiny lone ring 20 times to get rid of it. The power ups were a mixed bag. Ammo was the most useful and really should stack, but the power ups that should have been useful only lasted a short time making them absolutely useless when the ball decides to fly horizontally. Seriously consider rethinking the physics and the power ups.
It does get too easy once you have the upgrades and kinda boring...until you stick with it to the point where you have a wall of green (roughly 200000). Good concept, but it needs more substance.
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 "Tahiti Hidden Pearls"){kind=icon}
 "Electric Box"){kind=icon}
 "The Virus Game"){kind=icon}
 "Cell Warfare"){kind=icon}
 "Breach 2"){kind=icon}
 "Space Pips"){kind=icon}
 "Square2Ball"){kind=icon}