Ohh Hi! I've come across pianojacq before! Definitely love how clean the sheet music looks and on first glance the way the song plays smoothly even when you hit the note a little late/early works really well! That's one aspect I really need to improve.
I see you're also using Vexflow. Are you using a library to go from Midi to Vexflow format? It's a rabbit hole I sometimes wish I hadn't entered :)
@OP Can really recommend VexFlow [0] when you do get to implementing sheet music.