in order to fully unlock the bonus level (which also unlocks badges!) you need to access the hyperbollic soundwave and fire it at the dragon's underbelly. This should reveal a maze in which you need to press right, right, down, down, up, left, up, down, alt, F4. This will NOT close down your browser window.
 "Multitask"){kind=icon}
 "Idle 2.: Konquest"){kind=icon}
 "Box Clever"){kind=icon}
 "Little Wheel"){kind=icon}
 "- Music in Motion -"){kind=icon}