I like the idea, but I think it feels pretty empty and random. I found a lot of areas taht seem like dead ends, and there are so many turns it's hard to actually find anything. I think it could really benefit from a minimap, especially one that fills in as you explore.
Also, I think you might have set the window size incorrectly. There's full screen, so it can still be played fine that way, but otherwise the game window is very, very small. I had to keep going full screen, then exiting to read the controls(until I got used to them), then re-entering full screen so I could see again.
Overall, nice idea! A bit more developing, and it could be a great game.