I'd also get down more to the level of the car.aube find a pathway with greenery behind u can blurr out( shallow depth of field)
not a fan of selective color in here for the reasons mentioned in this thread.
at the same time. I think it a great idea. A fun shot.
As for critigue... I think it might have been better if you had left a bit more space at the top so the subject could have been centered in the frame... Now that being said... you can always crop to an irregular aspect ratio to give a similar effect...
With the original image cropped at a 1.25:1 ratio... I came up with this...
Just a thought...