I love the idea, and I like the simplicity of the layout. That's why I clicked on the game! Even without a tutorial, it wasn't difficult to understand, which is in contrast to a lot of the games on here that I played.
In fact, I think I prefer it without a tutorial, because I enjoyed trying to piece together what I was supposed to do. That was a big part of the fun for me.
When I figured out what I was supposed to do, it felt a bit too easy. If there was more of a puzzle to it, such as "Only 3 Treats", I think it would make the game even more interesting :)