great game. Simple and fun. There may be a way to do this that I didn't see, but you shouldn't have to click try again with the mouse, there should be a key press to do that.
great game. Tip for people having trouble, use your gun and try to get head shots a lot. Also, use the regular gun on the big robots and don't waste good ammo on them. Use shotgun for guys in cars and rifle for invisible guys.
great game!
also, tip for level 4!
the enemy has a certain range, and it doesn't start right next to him, so you need to keep the shield a little bit away from him for it to be in the range...