The idea is great and it really captured my attention. I like this kind of approach too, I man can't live only with the traditional assembly/primer/paint-job/future/oil-wash/flat-coat/pigment-dusting style
In my opinion, the level of realism could be improved with the use of material more adequate to this scale. The figures could have been painted in a more accurate color. The canvas top could have been done with tissue-paper painted with white-glue, for example, and the flames could have been done more like this:
https://armorama.kitmaker.net//features/1816I have seen a similar diorama in the past but unfortunately I didn't save the photo. I believe it was from an Asian modeler and he also used an Opel Blitz but it wasn't so spectacular. I hope to come across that diorama again one of these days, it has been on my minds eye for I while.
Keep showing your work and feel free to pm me when you start another project like this
:-H