Press WASD or the arrow keys to move and jump. Hold W or UP to jump higher, or release it quickly to do a smaller jump.

When you're on the ground, press X or click your mouse to attack. Open doors by attacking them. While jumping, press X or click to dash. You can only dash while in the air once, but if you bounce off an object you can dash again.

Make sure to get enough coins to afford the pizza, or else you might not get the ending you're hoping for.