Improve the "Move on the Beat" nudge text so that it is displayed constantly while the player is standing idle, also alternate between "Move on the Beat" and "Press E to dance" at consistent rate
Add display of "Speed up!" or "Slow down!" text if player is pressing keys too quickly or slowly relative to the beat
Set the beat progress bar to red for remainder of beat if the key is pressed to early
Disable key mashing by ignoring all but the first key in a beat