Well, obviously, a lot of us are finding that jump impossible. It's the jump on the far right, not the jump to the top platform. The character simply doesn't jump high enough, even holding 'x'. It might be a frame-rate issue like in the old Doom and Quake games.
 "Manufactoria"){kind=icon}
 "Word Juxtapose Idioms"){kind=icon}
 "Don't Fall"){kind=icon}
 "Pwong 2"){kind=icon}
 "Fishing Girl"){kind=icon}
 "Flying girl"){kind=icon}
 "Worlds Hardest Game"){kind=icon}
 "the worlds very hardest game"){kind=icon}