What's wrong? The fact that you're not blowing anything up.
Laz, I had already cleared the level. Sheesh, you make me sound like I don't know Descent.... *shot, knowing that that room had 2 Red Hulks and a Medium Hulk and on Ace, was kinda hard, but being an open room, still easy*
And on the Space Invaders one, there's an extra shield thing to the far right, and way too many enemies on the screen.