What a cool idea for a game! I found it surprisingly easy to memorise what each attachment does based on visual alone, even though there's a nice big variety of them. My favourite is the purple spike one because I love launching myself off of enemies and the impact feels very real.
For the first couple of rounds it was hard for me to tell what was what (an enemy, an attachment for my cell, or food) so I kept running into bad situations, but once I got the hang of it I figured out there's actually quite a bit of strategy and movement tech packed into this thing.
The vibe of being under a microscope is a great idea as well. I feel like I'm just looking through at a little microscopic world where stuff lives and dies all the time. Even the small details like showing the temperature in the bottom don't go unappreciated!
Reminded me a bit of agar.io, that classic (is it technically a classic now?) game about cells eating each other. I can see this being an awesome online experience with a community dedicated to learning how to play optimally and all that stuff.