If that works for you, ok. I have my keyboard connected to my computer, so I am actually at my keyboard as I use the site. Its still nice that I can click around quickly and hear different chords and scales and such, without having to be held back by my limited piano skills.

Could it be improved if it supported web midi and encouraged you to actually use your keyboard? Maybe. (I actually do web apps that do that) But I'm curious why you can't see its value for what it is, which guides learning rather than just basically saying "figure it out on your own."