Thanks so much for your kind words and feedback! I've been told be a few people that the control mapping could be improved, weirdly enough when I played I always had my left index on 'z', left middle finger on 'a', and then the right hand was mirrored for right index on 'x' and right middle finger on 's', so the result is both hands kind of pointing towards one another. I think it was jam logic that made me do this once and then assume that it was fine thereafter, but I see now that it's definitely not people's default setting haha. Whoops.
I considered displaying the accuracy for all machines, but I didn't want to overload the level ending screen. I had thought it would be fun to show the player's in-depth stats at the end of the game, but I was a bit busy making a tutorial ;)