Island Hopping


Hint: Enter the red teleporter from different directions to reach different islands.

Full Solution:

Enter the red teleporter from the left and you'll exit to the right island. Don't pick up the key yet! Push boulders along green and blue paths to build a bridge to the blue button. Pick up the key, exit the area and now enter the red teleporter from the right. You'll end up on the left island, where you simply follow the red path to get all keys. Now enter the red teleporter from above. Step into the yellow teleporter and follow the yellow path to push a box through the yellow/red teleporters and build a bridge at the yellow "X". Collect all keys and exit.