I like that we can harvest the luminous spores, but it doesn't have any attributes, and I haven't been able to find enough to craft something out of it yet. I was rather hoping that it would make the gear glow or something so I wouldn't have to carry around a lamp and waste one of my hands carrying something I can't fight with.
I would also like some warmer and cooler clothes, the desert and forest biomes have some serious temperature shifts.
Maybe you could consider creating a frosty snow biome and a volcanic biome?
