Um... Ok. *Takes out pistol* Now it's war!!! But also, there should be yellow key blocks, rainbow, gold, metallic, one with a strange eerie green glow around it, and one that spins/rotates.
And in addition to this comment-fight, I have another suggestion. A music block where if you jump on it, it plays music but only in that area. And there would be 4 looped tracks to use.
But with they key blocks, [A] There's only 3 colors. And [B], if someone hit a key somewhere else in the map, then the design would be solid and people would walk on it, which is NOT what I suggested! Check, and mate.
 "Anger Management?"){kind=icon}
 "Smiley Showdown"){kind=icon}
 "Robot Wants Fishy"){kind=icon}
 "Everybody Edits 0.6.x"){kind=icon}
 "Crash Test Launcher"){kind=icon}
 "Darkness 2"){kind=icon}
 "Seven Deadly Sins"){kind=icon}