I like the idea of car being half sunk into the water after it fell through the ice.
Diorama does the job.
It is original. And does what it is suppose to do.
It makes me keep asking one thing: WHERE IS THE DRIVER?
Probably he is not in car, as I can see pretty cozy fishing place.
Maybe he just forgot something in the cottage, so he went to take it.
Or maybe.. No… Maybe he forgot something in his car?! No. Yes. No. Noo!

I might question only the overall size of the diorama.
Maybe the modeller wanted to highlight the infinite snow surrounding.
Or the fragility of the icy water level.
If it would have been me, I would make it more compact.