1. Click the -icon top left in the Chrome address bar.
2. In the Flash dropdown, select 'Always Allow ..'
3. Refresh the page.
Riff Master 2
Riff Master 2 is the best free available Guitar Hero clone. Lay down awesome riffs, drop fat beats and unlock new songs and guitars! Choose song and guitar and push the buttons (A,S,D ..) at the right time.