Indievania is offering the Windows edition of Light Hero for free for the coming week, and the OS X and iOS editions of the arcade-style space shooter are also free through May 27th as part of a promotion offering a prize of "up to" $100,000 in prize money for one player who completes the game 100%. The prize goes "up to" $100K, but there's no word on what will raise or lower it, and no indication how low the prize scales.