Good, but...
I found this game, and played it more than 20 times yesterday, and I think it's a good game, but there are some serious problems (that have been mentioned).
- Power bar is extremely difficult (<=> no power bar is a bit too easy...)
- Around level 8-9 your ally's are too few !!!
- I don't think the cost of an upgrade is too high i think it's too high for this game as it is now. For example : If I spend my money on the two first upgrades, I won't get the third, since the giants will come and crush us all. If I keep the money to get the third upgrade (no damage), I will be maybe able to buy the first one. Then it's round 6, and I get rather much money. So I buy the faster soldiers. THEN you've got another problem : They are TOO fast. The three levels after buying the faster soldiers equals to this : since I try to make headshots, I kill quickly. So my soldiers just run from one side to the other, making it impossible to win a lot of money.
I think you should either lower the cost, or make the enemy stronger, AND your ally stronger when you're at level 8 and up...