1. should be able to send tanks to a location, not just attack
2. tanks shouldn't turn around and go home after conquering a base
3. it's almost impossible to select a group of tanks near the edge, if your mouse goes off screen the selection doesn't work
4. different tank models are unexplained and superfluous
5. too easy overall
Too easy, and the same strategy works for all of the open levels. Really no point in having most of them. The Mega towers and Mega Mega towers are way too powerful. Survival mode ends whenever you get bored of sending waves (for me level 7000).
It's fun, but way too easy. Is it really even possible to die? I think combining experience and hit points doesn't really work. I would suggest make life based on how many bubbles you have and how big they are. Maybe some of the bubbles you pick up replenish life and some give you xp. Or just make the enemies much tougher.
Fun game but the controls are absolutely terrible. How hard would it be to make a difference between clicking to select something and clicking to set a destination. So annoying.