Graphics sufficed. Music fit. Challenging, at least for me. Didn't figure out the space bar until after about 15 minutes of playing it. Oops. There are obviously a few things that would add to the game, like visual effects for when you get a bomb and etc. The only gripe I had was that I feel like it could have been zoomed out a little bit so it would be easier to see when enemies were going to right up on me firing tons of bullets. Aside form that, good job!