Hey I like yours as well! They're both different though. Your app is more focused on the ability to reproduce specific pieces.

Mine's based on the old electronic toy Simon - infinite and progressively more difficult.

https://en.wikipedia.org/wiki/Simon_(game)

You should definitely add midi controller support though - WebMidiJS makes it pretty simple.

https://webmidijs.org

> come back tomorrow!

I hate that I can't do a second one after finishing the first task... I know this is supposed to be this magic user engagement trick where people come back day after day because there's no other way to use it, but it's not for me if I can't choose when to play a game or practice a skill