The music was very very quiet for me. I normally have volume around 30 on my PC and I had to crank it up to about 80 to hear it. Anything else at 80 would really hurt my ears.
yeah I just tested it too in the engine I had my sound on 10 and it was pretty loud and in the browser it just got made more quiet but if you press esc and then make the sound louder there the sound is pretty good :/
