Nerdluster: Ridiculous Fishing is indeed challenging but if you add a little luck and put your mind to it you'll complete almost any goal you can imagine, just don't decide you want to get to the bottom of The Maelstrom. The Maelstrom is the last accessible stage and reaching the limits of its depths is impossible - it literally goes on forever. You can get Ridiculous Fishing in the iOS app store right now for $2.99 and at that price it is a steal, you'll get hours of enjoyment out of it for a measly 3 bucks. My only gripe is that it runs out of steam very abruptly once you collect a majority of the items, something that only takes a few hours of dedication. As a bonus there are a few rare fish that can be found to complete your collection but they won't yield any additional items or unlock hidden areas.