You wake up on a building, there are multiple buildings stretched out as far as you can see, with rope bridges connecting between all of the different buildings, there is no way to get to the ground. There is one skyscraper that is bigger than everything else.

You don't know why nor where you're at right now, there was a backpack against a wall on the roof you woke up on, the backpack has food, a water bottle, a lighter, and a pocket knife in it.