Great work. The UI is nice and clean and very responsive making it a very pleasant experience. Personally, the click and drag mechanic isn’t my favourite (I’m a slow click and dragger), but this is just a personal preference and I think it worked very well in this game.
I got a bit confused with the direction of the stairs and also which doors had been visited or not, but I think this can be improved with clearer visuals/colours to indicate which doors have been visited and the direction of the stairs.
I also enjoyed the humour throughout. Nice work!