Gday Janwillem
This has turned out really good! MY critiques would be aimed at the base moreso... I reckon the tank on more of an angle to the roadway would appear more dynamic. As it is, it seems it was neatly parked and took fire... (Hey, this may very well have happened! :-) ) As Alan said, if moving, the tank would possibly have shed the track on that side... Also, you would notice that even a little elevation on one side (the opposite side of the hit) can make the base stand out!
I would make the road edge more 'jagged' with grass, as it looks quite manicured...
Love the toadstools; nice touch...
Oh, and that figure is the only German one I own... Easy to build and paint?
Cheers
Brad