Game Controls
Thinking Music
During testing I had problems with playing the "thinking music" on some browser setups.
On one (soundcardless) PC, for instance, the second time I attempted to play a midi file, the browser would kind-of hang, while another PC would not play embeded midi files in non-trusted sites.
Whatever the reasons, you have the option to change it here. Experiment - see what you prefer.
Currently your setting is Music Off.