This is such a weird/fun concept. I made it all the way to Level 5. I'd love to see controller support and a level select screen!
As a player, I like to use the Xbox One/Series controllers cuz I know most apps/games with controller support will support those controllers. I see you're using Unity. If you're using the "new" input system, adding support for generic and specific controllers (like PS4/PS5) is really easy with Input Actions. Lemme know if have any questions