While I think the concept is interesting, and one of the more original applications of the jam's theme, I found myself frustrated by the execution at multiple points. Bugs involving scaling the water were numerous -- not just from scaling outside the walls, but also water auto-scaling to certain odd sizes after trying to scale them a second time, or the input simply failing to go through at all. I was unable to find a solution to level 8 -- I think that this game shouldn't require exact solutions like that level does, as any one block of water greater or lesser than intended on that level resulted in a loss.
Still, I appreciate the effort you put into this project! And the cat is cute, of course, which is always a plus.