This was super cute and fun! Got a mega awesome polish, considering the time to make and the concept is fun! I think if you wanted to expand the game, you could manufacture difficulty simply by limiting the buttons that CAN be pressed. So, like for beginner level, the options are just "QWERT" and you beat that race and you go on from there to the full "QWERTYUIOP" until you've got the whole keyboard to master! That could be fun, to have a sort of campaign to it. However, as it is, it's super fun and a delight to play! Lighthearted playful vibes are a treat!
It's like the party game Twister, but for your fingers! (There's an accolade quote you can use in advertising the game if you make a full version :P)