For some reason I was enraptured by this game as a child...I probably didn't have the thinking skills to realize...hey, this is impossible and tedious!
Kudos for effort and fitting it into 16K, but only a masochist (or me as a small child) would try to finish this game. You have no clue which of the 50 chests the goal is in, so you just keep picking up the sword, entering the next room, killing the monster, dropping the sword, going back to the previous room, getting the key, entering the next room, opening the chest, repeat.
Yes, your sword only points to the right, and you can only carry the sword, key, or gun (!) at any one time. Combat is pretty much random. Press FIRE for a map of the crypts, if you have the patience. If you find "drugs" in a chest, I think the only cure is to later find "food" in a chest...the trees won't cure you.