Cool! Reminds me a lot of Might & Magic, back in the day.

There are points where a room 2 or 3 steps away would appear to have a wall but was actually open, that caught me a few times. Then ultimately I got lost and gave up. Does the world loop? I tried drawing a map but it ended up overlapping itself.

Showing a minimap or compass might be helpful. But I think the main thing would be to draw floors a little different from walls. Maybe a blue-pen crosshatch pattern or something?

I always find these games with hand-drawn visuals very charming. I also love how you made an almost retro style fps.

great job!

funny) nice art) feels freedom of creativity) 

wow! Is so cool