in my opinion, th w whole medium badge is just medium, except for the sky captain badge, wich is impossible for ppl without patience, like me :P 4/5 for original game
i found how to activate ( and now a clear explanation, because ppl need it)
in the fourth lvl, there is some kind of building where you have to drop a gem on, do this and then complete the lvl
hint: first write down every step you will have to make, and then look whats the loop you need in a function, and whit this info, just get all the boxes required
 "Cuboy: Cubeture 2"){kind=icon}
 "Pinata Hunter"){kind=icon}
 "The Book of Living Magic"){kind=icon}
 "The Sagittarian 3"){kind=icon}
 "Mini Room Escape 2"){kind=icon}
 "Meat Boy"){kind=icon}
 "Paper Battle"){kind=icon}
 "Elephant Quest"){kind=icon}
 "Adapt or Die"){kind=icon}
 "Turbo Santa"){kind=icon}
 "Radical Fishing"){kind=icon}
 "Toxers"){kind=icon}
 "Smiley Showdown"){kind=icon}
 "Super Crazy Guitar Maniac Deluxe 2"){kind=icon}
 "Endless Migration"){kind=icon}
 "GemCraft chapter 0"){kind=icon}
 "Tower of Greed"){kind=icon}
 "light-Bot"){kind=icon}
for the music- there is.