Thank you! we are glad that you like the game and the breeding system. In terms of art,I really enjoy making assets and wanted to push myself to the limits! That being said, the code is even more impressing!
As for the map, you are absolutely correct. We were meant to add a light system to mimic the darkness in a cave. The idea was that this would being all the attention to the lanterns left by other miners. Sadly time constraints didn't allow it.