Despite being bad at geography, I completed the challenge and was 300 of from level 5, and I wasn't really paying much attention on lvl 4! If I'ld looked at what the medium badge was I may of been able to get it.
Just fiddle around with the directions a bit and few my amazing contraptions:
{!2%$29%1|&0"'0B+0(-2).0.50@709:22=22?0?@0@B2+D0)G2+I0@J0?L0#M22O2(Q0)S0?T2|V04W0)X2(Y0)^0(_2)a2(b0)i0(k0)n26x0&~&#(2)3~}
Put this into the enter code part and remember. When you've got it all in place and you set it off go 'dun dun dun dun dun dun dun dun, dun dun dun dun dun dun dun dun dun' in a circusy type theme and imagine Peter Griffin in a clown costume riding a uncycle inside a circus tent.
Adds to the effect ^_^
 "Bible Fight"){kind=icon}
 "Bloons Pop Three"){kind=icon}
 "The Stippler"){kind=icon}
 "The Game"){kind=icon}
 "Boomshine"){kind=icon}
 "Globetrotter XL"){kind=icon}
 "Battalion: Nemesis"){kind=icon}
 "Colloid"){kind=icon}
 "Icy Evade"){kind=icon}
 "Gravity Mouse"){kind=icon}
 "Electric Box"){kind=icon}
 "Cell Warfare"){kind=icon}
 "The Several Journeys of Reemus: Chapter 2"){kind=icon}
 "Dead Drunk 1.3"){kind=icon}
 "Super Stacker 2"){kind=icon}
 "Death Dice Overdose"){kind=icon}
 "Dreams"){kind=icon}