- On a PC, when using a keyboard, it's super counter-intuitive that one needs to double-press space for an action to be taken.

- The canon in adventure games dictates that all combination locks must have protection against brute-forcing. I.e., no solution should be accepted until the clue is seen.

Controls are too hard. In the shaft after the basin,  I just  cannot climb walls reliably. The "wall-jump then dash" trick that I have seen in the walkthrough looks impossible.

Fighting with the ghost on the green-torches scene is way too complicated, cannot get past it.