Can you predict how these creatures will evolve?

This is puzzle #1 out of seven. Stay tuned for the rest of the series!
As the first installment of the series, this was intended to be pretty easy. Little did I know how complex the math would get just by introducing a few mutations. I would be happy if you let me know how well you did. If you come to Discord and tell me your score, I'll add it to the leaderboard.

Discord: www.discord.gg/Q7eVbuHQyE
Patreon: www.patreon.com/ProfessorGhost
Ghost's Garden: Currently in Alpha and only accessible to Patreon supporters.

Music: Night snow by Asher Fulero

Models, sound effects, and other assets used in the video: www.pastebin.com/nkULTMfP

Claire finally got to star in a video! She had been waiting for it for so long.