Level Design: Gotta Go Fast

Wow these posts are really coming fast. No pun intended. Sorry that was a lie. 

Gotta Go Fast was designed to be a fast level where the player has to just run. But how do you make running a challenge? You need to make them run as fast as they can, No Walking. Also if they can't stop in time that can be bad as well. Finally a good runner needs to be able to regulate their speed, Not too fast, but not too slow. Watch the video to find out just what I'm talking about.