No using Z and stuff, clicking is the only item you use. Well other than arrow keys. When the heart appears: up arrow key is up, down arrow key is down, right arrow key is right, and left arrow key is left. That's it for controls. Literally.
Only 1 attack, lava coming up. It's easy to dodge. I made this all by myself with no scripts. I can only credit Toby Fox for creating Undertale. Nothing else. Thanks for playing.