Be a little careful with the lighting on the mountian, it makes Nova look like a giant. That curve on the bottom gives this a pretty good flow, but a little more will be better, he is, afterall, on a bike, maybe make the wheel look like it's spinning? Well..that is if it spins.
the mountain's lighting isn't coming from the bike but is sharing the planet's lighting
I tried a blur to make it look like it was spinning but it made it worse so I'm justifying it by saying that in those racing movies where the guy like skids the bike and the wheels stop for a bit. yeah. thanks for the comment ;D