I had issues getting the game to work. The title screen is fine but when I click play it just goes to the black screen most of the time. I did manage to get into the actual game a couple times though.
From what I saw, the game is pretty cool. I like the lighting effects for the bullets and explosions. Shooting at enemies is fun, and the shield is a neat defensive mechanic. There could be a little more variety in the audio (different enemy shoots sound, enemy explosion sounds, etc.) but audio at all is pretty good for a jam.