Horse Magnifier: The Full Horse is the full and expanded version of the viral puzzle game Horse Magnifier:

explore 50+ breathtaking levels

move many different types of magnifiers on and off horses

magnify equine creatures to your heart's content

create your own custom levels and share them on Steam Workshop

that's about it

https://store.steampowered.com/app/4585340/Horse_Magnifier_The_Full_Horse/

I found out about this because it was featured in an update from the Godot engine on Steam