If anything, people who are new at replay making need more cnc to improve themselves
Yet said people rarely get the comments they need so I'm here \o/
Cnc:
Try being more relaxed while running, your arms are way too stiff. If you're planning to make more replays in -30 grav, I'd recommend you try tricking to build on your ability to stay balanced.
A couple of replays without running starters might be cool but it's your personal choice