As an Insaniquarium lover, I liked the game very much, I can see where you got the inspiration from, It took me quite a while to beat the game, it's a bit challenging, I like the random upgrades you can pick from and level up and the fact I can hover my mouse to collect money. However, I think it would be nice to have some kinda sentry in the upgrades tab, you can have a limited few and must upgrade one fully to get another or some type of helper to help combat the monsters as they are a lot of them and they get stronger each round.