Not a bad little crawler but as noted was missing some features to really flesh it out. The art and dialogue with the characters were good and having some goals on things to look for was great. The movement and turning were well done too.
The perspective was confusing, I would always find myself needing to take one extra step coming up to a turn, so this could use some reworking. The dungeon itself is little empty and without combat, traps, puzzles etc to changes things up it got repetitive. The floor texture also seemed to be missing or at least just didn't fit in with the wall textures. There was no map and with the environment being very similar with no landmarks, I ended using the "always go right" method to make my way around, which is fine but just a note where it's hard to keep track of the map.
Luckily, there's something good here and I think with some work and polish this could be a gem. I hope you keep developing it!