It was really REALLY dark in the room I could barely see anything. I didn't even see the blocks people are mentioning. I kept stepping on the button and as soon as I walked off it would close the hatch. I suppose I should have looked around for those blocks people are mentioning but it was much too dark for me to see anything I could barely see the pegs. The mechanics were good and made sense with the story, great way to explain it! I was going to do a similar thing in my game but that wouldn't have explained the locks on your feet so I threw some feet on in the last minute.
I'll give it another go see if I can find those blocks.