Played until I got about 150 score and decided to give up there. The most interesting thing here, I think, is how many "health powerups" there are on the ground after you've killed a bunch of enemies. It becomes kind of interesting to have to path through them while running away from enemies. However, since the map is so big, it's super easy to avoid them even when there are tons. I think the game would be more fun with a smaller map. Initially I thought not being able to kill the health powerups would be better, but it may be an interesting choice to use your ammo on the health powerups to avoid having so many on screen vs using your ammo to kill the enemies and get points. I would occasionally get a graphical glitch where there would be horizontal lines across the screen, but didn't come across any other bugs. Overall, nice job!