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Ask the Author

If you have questions about a puzzle that aren't answered anywhere in these hints, you may contact the author.

How can I get back across the glass wall?
  • 1 of 4: Looking around, you won't find any extended wall segments up near the ceiling.
  • 2 of 4: But you don't really need them.
  • 3 of 4: Fire an orange portal so that it'll appear on the back wall next to the ceiling.
  • 4 of 4: Then repeat the process of firing a blue portal into the floor, dropping through it, firing another blue portal at the exact spot you land, and so on until you're flung back over the glass wall.