A serie of puzzles with very little or no way to directly interact with the puzzle elements. The only portalable surfaces are inside the cage where the cubes are.

TIPS:
- Check your position often to not fall into the goo.
- Zoom for a better view on distant elements.
- Remember where is the "active cube" (clickable button).
- Try to horizontally portal cubes to buttons if possible.
- The horizontal lights on the walls beside buttons are there (not always) to offer the perfect distance to horizontally portal a cube to a button.