Arrow keys or WASD to move. X or C to move slowly. Z (or space) to shoot. Hold z to charge and then let go to shoot. Use like touhou controls or deltarune controls ok? Touhou: use X or C instead of shift. Deltarune: alrighty, just an extra X or C to slow down movement. There is an easter egg. Hint: deltarune enraged spamton neo. (Activating the easter egg actually makes it harder a lot!)
All code by me. Deltarune yellow soul sprite from The Spriters Resource. Thanks to my friend Declan for thinking this is too easy.