This is one of the best tower defense games I've come accross next to the Gemcraft series. However once you start stacking recon and ammo stations and are past wave 35 of the later missions the game gets super easy. There needs to be more scalability in the creeps. The beginning of the levels are all fine. It's once you get enough cash to really sprawl out a really stout defense that it becomes almost pointless. Deff need to make waves past 35 on the last 10 missions or so considerably harder. 5/5 stars for me though. Good work!
Great start; but it's obviously incomplete and missing a lot of features common in today's popular tower defense games. Keep working on it; you've got the beginnings of a fun game no doubt.