Phenomenal game. Great job. In response to those complaining about the intermediate stages, it'd be too easy to complete the entire puzzle otherwise.
replies(1):
I think what might work is just if it says "Too early" and makes a list of stuff below the puzzle that you've solved too early and just put a checkmark next to it once it's ready and let you click it to enter it.
Right now it's giving negative feedback, I think it should be a positive to recognize pieces of the puzzle early, even if you still need to do the whole puzzle.