Thanks for playing and the feedback! Yeah trying to set the difficulty became kind of difficult, as there were times where I had a playthrough where I barely saw the entity at all, but sure I could add more on the range the game starts to warn you of the entity. When it comes to the button toggling puzzle, personally I got it so memorised after a while that it takes me few seconds to do it. If I end up making some kind of patch for the game, I'm thinking that I might add some kind of note in the cell that has a button combination that you have to press, that will appear there after you have completed the button puzzle once.