For a demo, this is pretty damn polished! It's not without its flaws, but it's still a solid showing.
Graphics and sound effects are good. The gameplay is interesting and very fun; I'm shocked this concept hasn't been more fully explored. The controls are good; although I love controller support, I wish keyboard support would be implemented.
The attacks seem like they don't hit often, which is my only complaint. I would say the speed of food/water drops too quickly, but then again maybe I just need to get good.
Overall, I can't wait to see what happens from here! Good work!