I know there are different levels of research, food, and advertising. But after you have completed these levels there isn't that much of a challenge - I also realize that the actual challenge is finding the 7 majic fish - but I'd love for it to have more levels. You earn so much money but the point of level three that all you get to do is cure sick fish from time to time. If there was more levels you would have to spend the hard earned money...
Just a thought.