Solid idea! In my view, this just needs a few finishing touches you should consider for your next jam: Some sounds are better than none, so you can just grab some from a website like pixabay. Generally speaking, accessibility is often overlooked, but is a crucial factor. You should try to add some sort of way to change the difficulty, since not everyone will be able to click fast enough due to physical constraints. I would also choose a more readable font (can still be pixel art though!). Overall a very good job and a unique idea, maybe you'll manage to add the finishing touches after the jam is over!