Pretty fun, brought back memories of insaniquearium, but the progression loop needs some work. The game doesn't really know what to do with resource management and certain items and fish are very overpowered early if the player is finally able to get their economy going. Seems like fish require too much food to keep alive.
As it stands there seems to be just the one hurdle: Getting a steady flow of income early on, and you can play many games just trying to get this up and running, then the game becomes too easy. Needs more reliable means of economy and more nuance to play from there.