Good
But kinda flawed.
The game system is nice, but the difficulty level is really epic, l mean, there is no way in hell someone can get a score of 255,000 in survival...
At least put some health packs or health regen in game, because it's pretty impossible to play it right now...
And l bet that the users that say that the difficulty is OK just played the first 3 levels and then quit....
Please make it more fair...