Thanks for playing, I appreciate it!
You've uncovered some interesting bugs there - have to admit I didn't see any of these myself.
As for the puzzle, it looks like you have got that worked out spot on, so I'll for sure have to look into what's causing the issue.
The second one I can guess is probably a simple mistaken transfer event on my part, easy to fix.
The third one seems even more odd. The only way the player can Game Over is by running out of Vitality either by not consuming items or being attacked after 9pm. Time itself is never a threat in and of itself so I will for sure have to investigate.
I apologize for marring the experience with these pesky bugs and oversights, I'll for sure check these out. FYI the code on the door SHOULD end the demo of the game, so you were right there anyway - good job!