Interesting idea but your levels are too big. I started going straight up at the beginning of the game. I spent like 1 minute going up and shooting. You can use the bullets to check for walls btw. So, I went so far up that there were no enemies spawning around me and I was just walking around aimlessly.

Was pretty interesting, could've really used some explanation on how to play or what the mechanics were. Also, the music only played in the right side of my headphones, which was really strange. Otherwise, pretty cool! Good job :D