Due to recent changes in the game this Custom Critter has become a game crasher, but it doesn't need to be. All that needs to be done is to fix it is to correct the lighting number in the critter.json. I realize that some people don't like to fiddle with their game files so I've repackaged the mod with fixed .jsons. Install it just like the original(pick winter or not winter, and drop it in your Custom Critters folder) and your fireflies are ready to light up your farm: Edit: removed since no longer needed.
