Crescent Loom by Olive

Knit bones, stitch muscles, and weave neurons into biologically-realistic underwater lifeforms.
It’s like Spore, but with actual science.

Liked the cell stage of Spore, but wanted more depth? Gotten merrily lost in the graphical programming puzzles of SpaceChem? Love the “can I manage to build this…?” creativity of Kerbal Space Program? 
Crescent Loom is the very first biologically-realistic nervous system simulation game. It lets you — in a hands-on, mad-scientist way — tinker with everything from neurotransmitter to the ecological niche of an animal.
So dive in and maybe — just maybe — by poking around with these simple creatures you’ll figure something out about how your own body ticks.

Crescent Loom has officially moved to 1.0, which means that I’m not planning any updates beyond bugfixes and specific modules/collaborations. Giving people windows into the inner workings of the brain continues to be my life’s work, but we’ll see what form that takes as we go.  🌺
The best way to keep an eye on this is by subscribing to wickletter.
You can share creatures you create on the reddit.