Yeah, I had the accidental item thing too. That’s why I tried to made sure the cursor was always on an empty inventory slot.
I think the main trick to this game is to take it slow. There aren’t really any timers or anything, apart from buttons with closing doors attached, so you can just carefully go from screen to screen, inspect everything, try things out.
If you approach this game as an action game, it probably doesn’t work very well. But doing it more like a puzzle game, it’s much more manageable.