Hey Max, I don't know about Safari, but it works on Chrome on my end.

It works on my iPad’s Safari.

For effective support please open a ticket at: https://www.tonegym.co/support/index

I had issues with my microphone before, if possible share a screenshot here of what the error looks like on your end. :)

Another tip that might help is to check you are singing in the right range. If you sing a C4 but they are looking for a C3, it won't recognise your note and it won't register with the system; it may appear as if it is not registering your mic. You can change your singing range before you begin the game.

Hope this helps!