Very creative, unique game! My player gets stuck when I type O on the wrong part of the wall that isn't a door.  I love the 8-directional keys (technically 9 since s takes you down the stairs). 

Woo a fellow roguelike maker!  Yours is really responsive with the movement and attack animations, the UI and character look nice, and the overlapping walls that become transparent when behind them a good touch.  The line of sight was well done, I like that I could see 1 tile through a door, but Im not sure if that was intentional, because I could also attack through a closed door.  I know there isnt a win condition yet, but I'd like to see more depth in the types of decisions the player has to make, think that would really add to the gameplay.   For a QoL change, you might want to make doors open by bumping them, and have a hotkey for a close door action, instead of a key for open .  I can definitely see you got some big roguelike fundamentals down, and have made a good foundation to build on to!

Hey! I liked playing your game! Thanks for making it ^_^ If I may give some feedback, I think it is important that there is a bit more player feedback in your game. For example, give me some sound effects or visual effects when fighting. Now I dont really know what is happening. Did I damage the enemy, or did they damage me? I know there is text, but it is difficult to see which text is from the previous rounds. And I think visuals and sound would be a lot more dramatic ^^
I liked the opening and closing of doors, while still seeing an outline of the room ahead. You know if a room is a dead end or not, so you actually have something to think about when choosing which path to take. Will I risk going into this dead-end room for more stuff, or will I continue onwards and expose as many rooms as possible to find the stairs?
Can I also say that I find the controls very unusual. I would prefer to just use WASD to move, even if that means I cannot move diagonally. And then use one button (preferably E) to both open doors and climb stairs
Anyway, I can see that the game still needs work, so dont take my critisism too harshly. I liked the idea a lot and I wonder where you will take it next ^_^