Since all of the other levels are about real world problems, that a little positivity can overcome, the last one that can't be beaten must be about the biggest problem positivity can't overcome. Humanity....or I could be reading too much into it. lol
wow. I love the video game aspect of this style of brain teaser. I love the artwork. Only thing that could make it better is to make it more, or just slightly more dificult. Have every incorrect click add points, and a timer that adds points. Then at the end, the less points you have the better.
 "FL!P"){kind=icon}
 "West Train 2"){kind=icon}
 "BadgesFreak's Running Pony Badge Adventure On The Pretty Rainbow :3"){kind=icon}
 "Ragdoll Achievement 2"){kind=icon}
 "Google?"){kind=icon}
 "simian.interface"){kind=icon}
 "Attitude"){kind=icon}
 "Endless Evil"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "Ricochet Kills 3"){kind=icon}
 "Tanks!"){kind=icon}
 "ESCAPE"){kind=icon}
 "Bloons TD 5"){kind=icon}
 "Bomb It 3"){kind=icon}
 "5 Differences"){kind=icon}
 "Factory Balls 2"){kind=icon}
 "Amorphous+"){kind=icon}
 "Toss the Turtle"){kind=icon}
 "The Endless Drop SE"){kind=icon}