Man, this game rules.
You can play it as an idle game and get all upgrades just for that, or do it as a normal game, and buy all of te stuff. And the best bit is, when you get all idle mode upgrades you get heaps of achievments ^.^
5/5
This is one of the best TD Games I have ever played. It's not too complicated, and the way you show what the next waves are, and what qualities those invaders are. 5/5, 2 thumbs up!
Fun for a while. Good if you've got 5 minutes to waste, but overall, the upgrades are WAY to pricey, so you have to do the same thing over, and over, and over until you get an upgrade that isn't worth it. So I'm giving it a 7/10. =\