You weren't lying when you said it never ends, huh... I realized the Hold Escape to exit was more of a "Thanks for Playing" when I saw it the second time, lol.
Very good puzzle design. Cool mechanic, well executed too. I love Portal 1 and 2, and this reminds me of those games in the best way possible.
The meat grinder death was also so gruesome. You don't see anything, but it was way slower than I thought it was going to be...