looks awesome
but here's some crit or maybe advice, you can isten or not

1. you've really cut of too much on those tree branches so some leaves are just hovering in the air (if that's the idea leaves to fly than they never fly so close together, much more randomly

)
2. u can use VrayDisplacement to create some grass on the ground cuz now it's quite noticable that the ground is absolutely flat - it'll add some realism too
3. those empty gravestones are really distracting, try to put some names there or at leas something (like your compettitors car names or smth

just joking)
p.s
IMHO I would add some more dramatic light in the scene along with the sky backplate and made the picture a little wider than it's now, kinda square