 Blek received " generally favorable reviews " , according to video game review score aggregator Metacritic . Though the game first released in December 2013 to little fanfare , critics " widely praised " the game , and it became popular in April 2014 . It appeared in the top ten paid App Store games chart in April , reached the top by May , and was listed into June . Blek received a 2014 Apple Design Award and was featured in their Indie Game Showcase . While it had sold 30 @,@ 000 copies by February 2014 , upon being featured in the App Store , it sold 500 @,@ 000 copies by May , and over a million copies by June . Edge compared its aesthetic to iOS puzzle game Hundreds . Reviewers praised the game for the amount of freedom it affords its players . 
