It was a nice little game. Infuriating, but nice. I am a bit let down that there wasn't some sort of ending however. I put in about 50 minutes hoping to see an ending of some sort.
I had this scenario in my head that at the end the balloon alerted humans to the dog, and if there was enough humans, they would be in a self sustained community and adopt the dog, but if there was very few humans they would kill and eat the dog.
If you're relentlessly playing this to see the conclusion as I was, spoiler alert (if you can call it that) the balloon just floats away and you get a title screen.