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This is a short and nice little game without any serious flaws, good effort for a first one!
I wouldn't call the interface LucasArts though; the only game that used a similar interface was Sam&Max.
A few pointers: The 2x2 pixels seem out of place. The graphics style certainly doesn't profit from them or convey nostalgia; standard 320 would have worked just fine. (King's Quest I-III used double wide (2x1) pixels, King's Quest IV has already 320x200).
The interface is also a bit weird; I'm aware that you tried to do a LucasArts style interface, but you ended up with the default Sierra interface and the same cursor for every mode. This is worse than the default game's interface. The obvious choice here would have been the BASS interface (left click interacts/picks up/talks to, right click examines).
Also, when the mouse is over an exit I always get the arrow, however I have to change to walk mode myself, otherwise a click does nothing.
In short, there is room for improvement, but I've also seen way, way worse first games.