The procedural generation and inputting your own seed add some lasting appeal here, but the gameplay itself gets repetitive after a while. There's no real need to fight the skeletons (unless they're stuck in a hallway) and barely any challenge as a result, which is something it needs. I assume there's no endpoint to the game (I got to level 12 before I decided to stop), so if the player is never at a risk of dying, there's not much to keep them engaged. There's potential here that hasn't yet been reached.