Auditorium is a fantastic, relaxing puzzle game composed of music and light. In each level, you need to manipulate the flow of light towards what look like equalizer boxes. You can move the directional buttons, and click and drag the edges to herd the light. When  all the boxes are full, you proceed to the next level.

Auditorium is a really intriguing and addictive multisensory experience — part puzzle game, part light sculpture, part musical instrument – Peter Cohen, Macworld

Pay the game at Play Auditorium.