I had to revise my rating. I gave the game one more shot. I hadn't tried one tower, the missile tower. It's basically the only tower that works. The cheap turret is seemingly useless. Even the heavy turret seems useless compared to missile tower. The are tower is needed to kill the little ones. Once I figured that out I could advance in the game, but then it became too easy. I made it to wave 62 and the only reason I died is because at that point I was sending 10 waves at once just to see it could be beaten. Not quite by that point. It's ok, but certainly could use some balancing and increased scaling difficulty. And is it just endless? I like my game to have an end. But by wave 62 I just didn't care.