Awasome game but....
The upgrades could be better and the enemy's could come in faster waves. I agree with some of this reviews. Like save function and have less kamikaze-attack fighters. But this is a very addictive game that I can play for hours. Maybe you can make a sequel to where you can have little buddies help you little out or have saw-blades shoot out back also. I love where it takes a Screen shot of where you kill your last enemy or when your die. Hope too see a sequel!