Fun game, I think skeletons and slimes could be swapped though. At least for me the skeletons were more of a challenge to plan for. I ended up using one island for all my factories and blocking off its spawner in the corner. Since there's no limit to how many types of items a belt can hold, just one line can handle everything. That's good since you're limited in connections between islands, but it also makes planning the assembly side of things trivial: just throw everything on one belt. I don't know when you would ever need the sorters or splitters. Didn't need any bridges either.
