I only play full screen. Not a fan of windowed.
I suggest having that map have room numbers on it. Like "Math" should say "Room 101" or something to let players know it is on the first floor. Or, just omit the arrow stuff completely and let the player fast travel. Poking arrow after arrow is tedious and dumbs down the gameplay, same as I recently told another dev. Personally, I find it boring having to click parts of a screen over and over to get around when there is nothing to explore or do otherwise. That being said, no offense, but I lost interest. Between that and the dialogue seeming generic and bland, I don't really feel invested. All for the high school theme, but everything else drew me from this game. Best of luck, though. Sincerely.