This was a fun little game with quite tricky controls. The theme was incorporated well. The music and sound effects were great. I think the visuals could have been improved. The backgrounds draw attention away from the rather simple black and white enemies. The flashing effect doesn't really fit in with the rest of the aesthetic.
Difficulty was a bit harsh. I died in one shot!
This didn't feel like a bullet hell. Was that what you were going for?
There's not really anything else to say given how very simple and bare the game is.
No offence, but it's pretty mad using assembly code with no engine!