Originally created within like a week for The Minimalistic Jam 2. Hence the intro, the 2 colour per sprite rule I mentioned, and whatever else that might seem unusual otherwise. More details here- https://itch.io/jam/minimalistic-jam-2

Arrow keys or WASD to shoot.
Don't let enemies reach you.
Don't miss.
Shoot to the beat to launch hyper shots for more points.
Press R to quickly restart a failed stage.
Click the screen or press Z to skip, move on, etc.