I liked this, it's a very creative idea for the theme!
I like that there's a lot of experimentation in getting the right size for the different animals!
My only suggestion, if you want to keep working on this game, would be to add more content, maybe like a level system, in which different animals start popping up. After you get a feel for the animals you have currently, the game feels like there's not much left to do, so maybe if you combined different animals per day you could challenge the player's muscle memory.
Very cool entry, keep up the good work!