i dont know what game you're playing man, but that sentinel 3 ain't no joke. i'm on level 14, made it to wave 57 of 60, should have only been 45 but i got lucky. those flying things kill me man. doesn't matter what i build, they go throug it. hmm.. actually i should have built missiles now that i think about it. still not an easy game.. and it has 2 campaigns, 35 levels total. each one takes 20 minutes or so.. kinda too long. what they should do is get rid of the first 10 waves of each level and just give you more money to start, uit's the same thing with less time wasted