It's a cool idea, but I encountered some issues.
I liked the 2D visual style, but I had no idea what to do. And I tried clicking on just about everything.
The feed and exit buttons seemed to be the only ones that did anything.
The picture of the cow also didn't seem to do anything. Is that what I'm feeding him?
Play, Pet, Shop, Green Happy Face and Red Sad Face buttons didn't seem to do anything.