Meh...
For the first few days it is good. But eventually you bring yourself to the fact that you are firing a rodent at circles, then realise, the progression, no matter how quick or slow is the same. Perks are a treat but they never really affect the end product, and the range is extremely limited. 10 is something I give to a game that is perfect, and has everything a game should have. This isn't that perfect game.
3/10 = 1.5/5
2/5 for presentation