Mobile support?

[karla-moreno]

Expected Behavior: Sound should play when a tile is selected
Current Behavior: The tile animates, indicating it has been selected/is active, but no sound plays.
Steps to Reproduce: http://synchrono-app.firebaseapp.com
Context: Hi there! I'm trying to make a mobile friendly web app that allows the user to use a 'launchpad'. It currently works on my laptop/Google Chrome but it does not work on mobile. Any ideas on how to fix/what's going on?
Your Environment: iPhone 7 running iOS 10.3.3 on Safari

edit: the demo doesn't work on mobile either :(