Unless you invent the next Angry Birds, this is pretty much the best you can expect to do in the AppStore:

Igor Pusenjak says the brothers have sold 15 million copies of the iPhone game, at 99 cents each. And while the game is no longer routinely perched in the App Store’s Top 10 list, he says it is still selling 300,000 copies a month.

Doodle Jump's creators say they're not making a follow up game.

One and done. Time to retire.