I guess I can't really say that this was a great game, because it truly wasn't. I still really enjoyed playing it, because of all the easy medals. I really do get frustrated when I can't get any. The main problem is that the graphics were just too choppy. There was little innovation with this. Most of the enemies looked the same.
The bosses were too easy. Then again, I didn't even care. You basically just had to shoot them before they fired bullets right above you. Just keep on firing like any game like this. That side shooting powerup does become useful.