Use the Space Bar to Jump and Climb. Press "Q" to access the menu, then again to close it. If you gain access to the Jetpack, use the Up Arrow to fly.
PLEASE READ: If you notice any bugs, please comment the problem! Thanks Very close to NYR 2, just new terrain + realistic physics. I would like to thank djpro for the tutorial that was featured a few days ago. He help create the realistic physics in this version.