Yeah, that's the last bug I was trying to squish, I've been opening the game in the window mode this whole time and maximizing it a while later. After adding tutorial pic it was unfortunately unreadable so I changed the game to start in fullscreen. Somehow it calculates the width/height of the desktop wrongly at the startup.
Picking/interacting is also something that I have to think about, I have to increase the interaction boxes. Pixel hunting isn't as severe though, all items have the same sizes so it should be much easier when the collision boxes for interactions are increased.
Doors shouldn't be locked. I think that exit is still active, just your exit position is - again - a little off and interaction box too small.
That error though, it's the second time now. Now that's the big one. Blue screen is my biggest enemy so if you have the willpower to trigger it again, it'd be very helpful as it's ruining the progression of the game.