It looks awesome, but what's the challenge?
I was going to write up a thing... Like a story line... but that will be a while.
Anyways, Here's a very basic (Don't want to give out too much for those who want a challenge at the challenge) Summary.
You spawn in your office building, about to give some papers to your boss, but the Office is on fire! The stairs you took have been blocked off, you must make your way down with out falling or catching on fire.
Then you need to get to the sewers, and then to the (what we call it) cbrown town. Rest is needed to be built.
But there are plenty of obstacles making it harder for your enjoyment.