Press any button at the correct rhythm to follow the path (and the music)! if you're having issues with timing, make sure you use the turbowarp link, disable high quality pen if you still have lag, and if timing is off, click the options sprite to adjust audio latency until the timing is correct. The "X" levels are on 7, 11, 18, 24, 29, 34, 40, 49, 55, 64, 71, and 78, respectively
I just added unique colors for different level sets, mostly for my own enjoyment