Thanks for your feedback, In the upcoming update I will... 1. add a toggle to disable sounds. 2. add an option to enable auto advance in future update.

It plays sound when the device is muted, has no preference to disable sound for the app, and moreover, the sound effects interfere with playing media, i.e. when I make a move the app pauses my music, playing in the background, to make a sound of a moving pawn.