Turn up your VOLUME, because sounds are very useful in this game.
Use the UP and DOWN arrows to move the handle.

Listen the  sound of the music box and try to follow the instruction in the left side of the screen, so maintain the right equilibrium!

Credits:

Programmed with Unity3d, i created all the graphics with Blender and GIMP. (love open-source)

Sounds are created from these users of freesound.org:
https://freesound.org/people/klankbeeld/
https://freesound.org/people/crawfordjohnb@bellsouth.net/