hey man, regarding the timing, if you download the game the timing will be better. the browser adds a small delay sadly. Nothing much i can do about that since it's the browser causing it :(
Ah fair enough. What i was suggesting was something along the line of either deliberately dlaying the chart timing, or the track (music) timing. You could implement this in a way much like rhythm games. Tell users to tap their key when they hear a specified noise/beat, or something like that. Repeat a few times, then offset the track start (music) by that amount.
Food for thouht.