It was a little confusing what the goal was. Do you want to keep the corral small, or large? Or is there a balance? And can you do anything besides just make it grow?
I would have enjoyed it more if there was a clear tutorial explaining how to play. Could be fun if you could control different sea creatures that help protect the corral as well.
Totally understand the time constraints though and would like to check it out once it is fleshed out more.