This is concerningly addictive haha
Great work, especially for three hours! The player feedback with the snapping, shaking, and sound effects are really satisfying. I think to keep the concept simple but to add a little bit extra, you could consider a timer that counts down until you get the correct key? Maybe each time you try the wrong one, the timer progresses a little faster? Just spitballing some ideas. Background music would also be a nice touch, but really, great work!