Can I suggest colours?
I really like that Thrall sprite, but I've always seen them as red-colored humanoids, since they come from being infected by red wasps. You drew them with a long robe, so no skin is show up, but wasps could dress them red because red in nature is one of the colours that animals use to show "danger for my foes" on their bodies. Like wasps, assassin bugs, scolopendras and other vicious arthropoda predators.
While the Stinger Thrall can be yellow coloured, since it blends more effectively in the nature (like near tree trunks, on the sand, between green glass), since it's more a cabable fighter than a "I break everything so stay away" explosive maniacal wasp-enslaved humanoid being.
Cockroaches can be like their smaller cousins, so all brown and stuff.
Stag Beetle I see them as blue giant bettles, and surprising even dwarf fortress look at them like that since the ascii sprite is blue.
Slugsnake could be something like yellow+green or brown+purple or even red+black. I'd like them very colourful and with two different colours, since both slugs and snakes tend to be very very colourful.
Giant worm, like tradition, could simply be something brownish or yellowish, the classical giant earth worm so the colour of the earth.
Royal scorpion could be all black, smooth and bad.
Green weaver and sparrow killer already have both their colours: green and red/brown.
Red wasps hive should just be something like
this.
Growing and grown organic weapons should be like cocoons like than said, maybe still something very organic and meaty. And the grown organic weapon should be visibly bigger than the growing (immature) one.
And that also for Red Hive, since than says that after 6 months they are mature to be butcherable... so this should be clearly visible to the player, to reduce micromanagement in the form of counting the months.
:edit: how to make piercing bullets? It seems that stone bullets are effective in bone breaking my hunter's prey, but they just never really die.
Also,
here it says that staff slings are created also in the forge... but where is the forge? You mean blacksmith one?
Aaaand... what is the slaughter gain from both cockroaches and beetles?
:re-edit: I'm starting again with the metal industry... aside from metallurgist no new building, as I can see. Anyway, there is the slag problem, we should put the slag destroyer between buildings... after all even kobolds have it.
:re-re-edit: It seems that there's a problem with stag beetles babies.
This little champ is coming from a pen/pasture which is giving no food problems to his parents, nor to a big family of cockroaches.
I know I must, and I will, divide cockroaches from beetles, but for now I don't have any problem aside from that one guy. Now he will become meat and chitin, since it's starving death, but I'm sure there is a problem into the code, where it says how much do those eat.