Ah, understandable. All of the puzzles felt very solid leading up to it, so I'm sure if you decide to continue developing it and rework those last couple they'd be just as good.
But hey, I wanted to share a link of my playthrough of it. Ended up recording some games I was playing/rating the other night and yours was one (actually the longest! haha). Check it out for some feedback and/or entertainment. Your game starts at 10:27