Odd issue, i think your volume may be too low, it's definitively not a web issue, but i'll admit the audio is really low on the current version.
okay that's maybe that, I'll check it again then
Okay that was it, I had to put my volume at 100% tho x)
oop lol, don't worry though, it's going to be fixed in the next build after the jam, planning on adding a volume button i couldn't add the first time