i'm glad that the loading screen at least showed the increasing numbers this time, so at the very least i can tell it's not just a black screen.
i'm not sure if i can say anything about the difficulty of the puzzles since most of them (along with the general setting) are very close to the original riddle school so i already came in half knowing how to solve them. aside from the first password puzzle (the solution of which i still consider to be a real stretch) i found them pretty straightforward.
another thing to note is that you can tell the environment is identical to the original riddle school, but not much thought was put into how those rooms should be used for the purpose of the game. as a result, the cafeteria can be entered but serves no purpose to the game since there's nothing to be done in it.
in regards to bugs (if you can call it that) some work could be done on how speech bubbles are handled. personally i'd think it would be much better if you didn't have to click directly on them to proceed. also clicking on a different interactible object will bring up its reaction even in the middle of interacting with something else (the previous interaction will be stopped midway).
unrelated to the game, but i figured i'd mention that you should paragraph your description at the very least, since i didn't even realize the link provided was a walkthrough at first because i didn't bother trying to read through the wall of text.