Good, but it could be a lot better. You should be able to take either axe from the shield, and it should have more of a hint that that's what you have to do. It was also short, and it's weird how there are only two walls in the room...
This is a great game. However, some things that it needs: a retreat button, a pause game button, and fix the bug where my tanks kept spontaneously flipping on the very right of the last level(I had a pile of like 5 tanks there. :p) Other than those though, this is a great game. 5/5 and faved. :)
btw, flamethrower = pwnage 8-)