finally beat it! tips.....
Like the guy said before me, the game was just too hard, alhough I finally beat it. At the end with the first boss, keep shooting the big guy at his head, so the bullets bouce off away from you. This slows him down. When he's far enough away, jump onto either wall as high as you can and shoot the small guy. The first strike by the big guy will not reach you. Keep shooting for about another 3 seconds then jump off and shoot the big guy in the head to slow him down. Continue to follow this strategy until the icicles that you have to shoot.
For the small guy, when he jumps high in the air he's gonna do his attack. Obvously, you gotta run here. What really drains his health is doing some kind of Super Mario 3 trick where you let him shoot out his own floor. You'll get ice below, and shoot him into it. The ice will probably kill him.
As for the game, very addicting but frustrating, and the elves were WAY too accurate. Concept was good though and the gameplay smooth.