bubble cube demo

A witty 3D version of the popular break-game:
Many colored bubbles are in a cube of glass. You have to remove all of them by tapping.
But you can remove only groups of adjacent same-colored bubbles, no single.
You can rotate the cube by tapping into the free space below.
You can let the remaining bubbles fall down from any 3D-position.

In the demo version the time is limited to 50 seconds per cube.