It may be a good idea to have the road move backwards, so it actually looks like you're driving. (Or have the car move forward instead of the crates backwards)
Also it would be cooler if the explosion was emitted at the location of the collision. (But maybe that's just me.)
I'll experiment with the bullet speed a bit and check if the feeling improves. I think the bullet glow is a bit too strong... I'll see if I can differentiate it more from the bullet itself.
