The cave is simple, playable, inviting and most important of all, holds the RPG mystery within itself. Being honest, I really like it, but it's a little, tiny bit too grey. I know that's how it's supposed to look like, but a grass tuft here and there wouldn't cause any harm and would make the picture look a bit more sophisticated and add a bit 'warmer feeling' to it.
Simple, but great mapping keep it up, cause that's what I love!
Regards
Sey~