Very good game, but I thought I'd REPORT A GAME-BREAKING BUG. I'LL TRY TO BE VAGUE BUT THERE MAY BE MINOR SPOILERS HERE: In the abyss, with the slow platform elevator, I walked onto it and it started to descend, but then I changed my mind. I jumped off (sliding against an invisible wall as I moved back onto the ground) and explored around. When I returned, the elevator was stuck where it would have gone off-screen as I stood on the ground, and wouldn't descend. It was far enough down that I couldn't jump out either. I had to refresh the page and start from a checkpoint before the tower. That worked and I finished the game, but it was a nuisance to have to redo things.