I noticed that the doors don't change orientation when placed according to the position of the walls on both sides. Although that doesn't make too much difference with graphics, considering that the ascii symbols is a '|', it can be quite bizarre when it was supposed to be horizontal. Is that complicated to change? I'm not too versed on programming and I think you would have to make some special code especially for it instead of just the placement of the symbol so it would be understandable if this was a feature for a future farther away.
Also, it seems (at least on my free Mac version) that there is no way of knowing if the door is locked or not. When you place the pointer over it says to right click to lock, independently if it is locked or not. In my view the easier way of solving this would be changing the text when the door's already locked to “right-click to unlock”, that way you know that door is locked.