I realised that I'd accidentally allowed a couple of buggy lava tiles into the latest version of the game, which would result in the player getting completely stuck if touched in the wrong way. Those should have been fixed in the patch I just uploaded. Lemme know if I didn't catch them all!
To make this blog a little less boring, here are some new images resulting from the important part of my recent update. The maps are now less square and the "outside" parts of the cave are darker. I've done this in order to add some extra realism and depth to the mapping: