Really good but poor instructions
You flashed the active keys on the screen for like 2 seconds without saying what they did. I had to actually restart the movie just to catch all the keys. And then you didn't even state that you can use the arrow keys (which I found out by just trying them). Plus the 1,2,3 and 4 only work on the numpad and not the ones in the middle of the keyboard. Try putting ALL the keys and what they do on the title screen before you hit play or some place else that the viewer can reference.
Other than that this is really remarkable. Very well done animation and the control part blew my mind. Very good job.