I like it! Good job for your first try at editing screenshots. My only little complaint would be the shadow really. Considering the sky is very cloudy, the intensity and opacity should be a bit lower so it would make for a "softer" shadow as there is no direct lighting through the sun pointing at the rider.
Other than that the placement of the shadow is kinda off but I find this to be the hardest part in editing screenshots. Looking at the shading and lighting on the riders gear and bike, the light is coming from the the direction of where the "photographer" is standing, so the shadow should've been flipped towards the dark "offtrack section" on the left hand side of the rider. As the shadow would've been hidden by the rut anyway that way, there wouldn't have been any visible rider shadow if this was a real photo
![Very Happy :D](./images/smilies/icon_biggrin.gif)
But anyways this is a cool screenshot and I'm looking forward to seeing more from you!