Just make the path wider as it comes towards the camera. That should do it. Look up a tutorial on one point perspective it will show you where the guidelines are, just keep roughly to them (the path can still be organically shaped).
In terms of colour, it's nice, but you need to tweak the contrast mainly so we can actually see the subject matter - the fact you had to describe everything kind of shows this up. Try just boosting the brightness of the whole image, as well as the contrast slightly. Should get you a long way.