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?