meh, ok.
At first this game is interesting, but after you buy all the stuff, it gets boring. More diverse things can help or upgrades, the ozon thing could be upgraded to 2-3 layers for example. the game is smooth actually, just like many games it's repeating itself and that gets boring after the first...10 levels.
Graphics were cool, i liked it. style was not to my liking. sound - the music was annoying, horrible. Overall - 6.