This was pretty neat, the old school monochromatic red colour scheme is nice, and the variety of enemy types and designs is good.
The only downside I had was the shooting being linked to tapping repeatedly. Which for me is abit more wearing on the hand than I'd like. Same reason I'm not fond of clicker games in jams.
I didn't manage to reach the second stage with the boss, but I enjoyed what I played.
Good work!