In our second weekly round-up of the Perpetual Testing puzzles we've been playing, you'll find a pair of elegant testing chambers--one little, one huge and twisty--and a terrific proof of concept for time travel, Aperture-style (the latter is built with the Hammer tools rather than the Perpetual Testing kit). Enjoy!
Download this week's tests from the Steam Workshop:
Have you made your own test chambers? Seen any you think should be featured? Let us know in the comments below, or tweet us @gamespotuk!