Grow, split, and swallow your friends.
Eat to grow
Hoover up pellets, then swallow any cell clearly smaller than you — you have to
cover most of it.
Split to hunt
Space fires half of you forward at speed. It's how you catch things you
can't outrun. Halves rejoin after about a minute.
Green pads shelter you
Hide under one bigger than you — you'll faintly see anyone sharing it. Outgrow it and
it just blocks your way. Get 5x its size and you can shove it aside.
Red pads kill you
Any contact, at any size. Split first and you'll only lose the cell that touched.
The bigger you get, the more of them appear.