I really love the part where you're going to the epic ending and you get four options: Metroid (eats you), Crowbar, (randomness happens), PokeBall, (EPIC FAIL), and that Super Mushroom. (I LOVE them. Use it, and you'll grow HUGE. THIS is the way to an EPIC ENDING!)
My character kept on going to the left one time, and I mashed the keyboard SO hard that the "V" key flew off! But luckily, my dad reattached it - by using his hands. But hey, my "V" key still works, or else I wouldn't be able to search this game!
The last frame of the second 1337 challenge scared the crap out of me (when the "Rage!" button gets in the center and REALLY, REALLY BIG and the triangle gets a bit smaller.)
Tips: Try to build the track efficiently and quickly, as if the train falls off a track, it'll explode. (and DON'T make TOO tight of a turn, or the train will tip over). Don't run it into anything explosive, as then the force of the explosion will be as of a nuclear bomb. And don't make the place lose TOO much money!! Sometimes you will have to ram into buildings, but don't go through too many! And bridges are a pain in the butt (only build them if you really need to.) You cannot build too long of a bridge or too many tracks.
Might need some more levels... maybe more tricks... or difficulties... or different runners... possibly an endless mode. And furthermore, it might need another music track, because some of the comments on here are for wanting a "mute" button. AND a mute button, like they suggested. (But HEY, I might like the music.) Can you PLEASE give it some more parkour flair? Some controls could be: slide = down key. ledge to higher ledge: left, space, up, right, space. repetitive wall bounce: left, right, (and continuing until the top ledge is reached). monkey vault: up, space. frontflip: up, right. (I am NOT listing the ENTIRE list here, in this one comment, because it'd take up at LEAST an ENTIRE PAGE!) Anyway, do some GREAT improvements, please! It'd be surely swell! (BTW, my best score currently is 1:04. Trying to make a PERFECT RUN!!) :)
I gave up on level 19; you have a drone in your path that's trying to make you give up. My badges would be: "Gullible: Click the "Give Up" button." and "Never Give Up: Complete all the levels."
Arrgh! The only complaint is that why oh why do you have to COMPLETE ALL THE MISSIONS just to BEAT THE GAME? There could be an objective to get the key, like getting all upgrades!
 "Parkour"){kind=icon}
 "Stealing the Diamond"){kind=icon}
 "Vex 2"){kind=icon}
 "Not Another Pointless Flash Game Button In Which The Button Goes In Another Rambling Adventure Talking Unimportant But Interesting Facts In Which Kongregate Users Rate 1/5 And Don't Play The Stupid Game Yet They Still Wonder What The Game Is About Only Be"){kind=icon}
 "iStunt 2"){kind=icon}
 "Unstoppable"){kind=icon}
 "Stunt Master"){kind=icon}
 "Free Running"){kind=icon}
 "Cemetery Sprint"){kind=icon}
 "Give Up"){kind=icon}
 "Super Duck Punch!"){kind=icon}
 "DinoPanic"){kind=icon}
 "Shopping Cart Hero 3"){kind=icon}
 "Knightmare Tower"){kind=icon}
 "SCGMD4"){kind=icon}