One suggestion (for a future revision): the sounds should have the same pitch as the notes being played.
Thanks for the feedback! And for playing! :)
I ended up creating a native iOS and Android app, since it's more accessible for most people. There's been A LOT of changes compared to this old version. There's also more games in the app.
Let me know what you think if you decide to try it out.
Here's the link to each store:
iOS: https://apps.apple.com/us/app/diddle/id1630555349
Android: https://play.google.com/store/apps/details?id=com.Wimbo.NotesChords&pli=1
Cheers!