Vroooooom... check out my custom Aston Martin! I will give you 5/5 if I was 4 years old, but unfortunately (or rather fortunately) I am not... 1/5 (because there isn't a 0/5 rating)
To get the hard badge, you need to acquire the antimatter shield as soon as you can; by level 13, I think.
After that, you just have to be patient because it will take insane amount of time to beat each level.
 "It Finds It"){kind=icon}
 "the maze game"){kind=icon}
 "A Simple Guessing Game"){kind=icon}
 "InnardeildarTstFromGuys"){kind=icon}
 "Pimp My Aston Martin"){kind=icon}
 "The Genius Quiz"){kind=icon}
 "Puppy Fetch"){kind=icon}
 "Freaky Fun"){kind=icon}
 "Submachine 0: the ancient adventure"){kind=icon}
 "mr. Mothball 2: cotton carnage!"){kind=icon}
 "DayMare Town"){kind=icon}
 "10 Gnomes 5: the shipyard"){kind=icon}
 "Mission to Mars"){kind=icon}
 "Golphysics"){kind=icon}
 "DayMare Town 2"){kind=icon}
 "Shield Defense"){kind=icon}
 "colorwars"){kind=icon}
 "abstracta"){kind=icon}
 "( Ellipsis )"){kind=icon}
 "Paladin: The Game"){kind=icon}