Launched just last September on Android, OpenFeint already has spawned several top 10 Android hits, including Fruit Ninja, Super KO Boxing 2, and Flick Kick Field Goal Kickoff.

ENGADGET: OpenFeint and The9 will stimulate devs to port their games to Android with cold hard cash

Team Ninja should add a super-easy mode called Ultimate Hardcore Nightmare Mode to the next game.

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