Amazing adventure game!
I really liked the old scholl UI and of course the amazing pixelart!
Additional I have played the original games which you have used as inspiration so +1000 for nostalgia!!!!
Also, so far, I really like the quite unique setting of your game!
It's is possible to put keyboard shortcuts for the actions? Having to click each time on an action first get annoying very fast!
Also I think that the movement action should be mapped to the numpad keys to allow fast movement within the game (since their positions is quite similar to the exit positions of game locations).
Also you should put the default graphics scale by default to at least x3 even x4 since the default x1 in today monitors produce a veryyyyyyyy small window ;-)