You are the Lord of Evolution... well, you will be, now you are just a cell floating around in the Primordial Soup.
You currently have a COMPLEXITY of 1. What will you do?
Split into two.
Develop chloroplasts and centrioles. Oh yeah and an Endoplasmic Reticulum.
We don't need a proboscis because we can just absorb them. Study cells Crash.
Save up a whole bunch of amino acids to make evolutionary leaps that would be impossible in nature, like a propeller. Or a gun.
You choose to make a wiggling tail, that is also a proboscis, cause those are cool.
You use 15 Amino Acid (AA), 10 Fatty Acid (FA) and 20 Adinosine TriPhosphate (ATP) to produce it.
In the meantime, you burn up 5 Glucose (G), producing 5 Adinosine TriPhosphate (ATP).
ATP=85, AA=35, G=95, FA=40, NA=50/50, DNA=100%
> Develop limestone-esque shell, into which you can hide, only revealing your proboscis/flagellum when you need to move or eat.
> Develop spot of photosensitive pigment on your anterior
Ugh what a terrible G/ATP ratio. Find a random floating mitochondrion and suck it up with your proboscis. Or just make one if there aren't any around.
You sturdy up your membrane by pumping in some Keratin and you make yourself more sensitive to light.
These things cost 30 AA, 20 FA and 20 ATP in total.
You now have +1 physical exterior defense!
You now have +1 photon sensitivity!
You burn up 10 G to make 10 ATP in these two turns.
You sense some things nearby.
ATP=75, AA=5, G=85, FA=20, NA=50/50, DNA=100%
Approach the light colored thing.
Suck nutrients out some of said things with your nifty proboscis-tail.
Make more DNA and split!
Grow miniguns. Use them.