the there was one button two functions, so I made a game where you play with a round button and you fight against square buttons and exploding whool balls, still the theme implementation is that the shooting button functionality changes everytime the beat changes (with a 3 seconds cooldown), sometimes you can shoot, and sometime you can dodge using the left mouse button.
Sorry for bad UI, and bad pixel art, use arrows to move, space to pause menu and escape to quit the game, and left mouse button to shoot or dodge.