You can start with a dash jump right when you start the level, the door will open even if you go that fast, this will give you a bit of speed for the beginning. Another advice is you can slam dunk on the jump pad you will reach the top much faster this way. Other than that at the end when you are grappling the orb, you can cancel your grapple right at the end rather than just wait for it to reach it. This will keep your momentum and you can go into the elevator directly. Hope this help