I will evolve something here starting with a single cell in kambrium.It has no target and decisions are made pretty randomly.
It will stay within spores boundaries, only using spore elements, to keep it simple, not lost in absurd details, and close to the game.
I wont use pencil,paper and scanner, just paint, flash and 3dsmax. I make the images WHILE writing the text to it and have no plan were it leads to.
You can add anything to it.

It starts a little earlier than spore, with the first multicellular being,
bob, inside of a pond of single cells that just grow and split for millions of years, from now on called food.
Bob had a mayor mutation in its skin that caused multiple changes so it split into 12 more attatched cells around it. (2d drawing shows 5 or 6 of them)
So bob was the first multicellular life in his pond, noone knows because senses have not developed, thasts why everything is so dark. Aslo noone knows the relative size of the pond.
Bobs advantage was the ability to catch and crush small cells, instead of just collecting minerals, so he quickly developed into
crushy, a more stretchable flexible version of it.
Harry resulted in another less flexible but more sticky skin mutation by little hairs all over it. Some hairs even became longer and caught prey like tentacles. Harry is very agile and its population grows quickly if it finds a lot of food in a new location and spreads out if it runs out.
Crushy later mutates into
assa, who can assimilate and store food in it for some time instead of just foraging it like Harry.
Assa then beccomes the farming creature,
fam, that just catches and breed his food in colonies of connected fams.
A third branch was caused by a dominand central cell that "dried" the surrounding cells into pruny-spikes.
Spikeys prey are large cells. Harry is also a prey of spikey so harry developed into
scid, who's outer cells could not be spiked anymore, and
iccu who has the first "swim away from that" sense to move away from anything, even rom the prey he just caught. That makes him a little picky and more spreading.
Assa also evolves into
adi, using a network of his siblings as a shield.
Spikey evolves into
torr, who is now a single cell with randomly shaped hard spikes to crack up fam-colonies, and
pata, a leech that attatches to fam colonies.
Now.
Fam is a collective social farming fungus in the center of the pond that can build up large colonies.
Adi is a more intelligent swimming species primitive touch sense to avoid obstracles and to regrow lost structure.
Iccu and scid are like squids that catch colony parts and spread out to saver boundaries. They have a primitive touch sense to escape from others.
Thorr is a virus-like hunter that splits and harvests colonies of food and fams.
Pata is a parasite that attatches to everything.
torr will soon develope an echo-sounding-system (decided by a dieroll) to take a look at this primitive tiny early ecosystem.