fun little game. reminds me a lot of playing spore back in the day.
i think one idea to make the game slightly more grounded would be to have each color of creature correspond to a specific size (although these could be cyclic). that way, you can tell how large you are getting with some consistency, as right now it's kind of hard to feel like you're getting any bigger than the creatures around you.
one fun mechanic for me was watching the creature that ate me later get eaten itself. i think this game could actually make a pretty fun idle game of some sort, watching these creatures run around and eat each other, with different behaviors and what not.
the creatures themselves are definitely very nicely put together. i think the procedural animations
(as i understand them) that you have are pretty cool.
one thing that surprised me going into this is how hard it is to actually aim your tongue at the prey. this definitely gives the game a bit of nice challenge in its current state.