Not bad :) Did you use Particle Illusion for explosions and fire? If so, I did notice some explosions looked a bit strange as the explosion did continue downwards below where a ground level whould had been expected. If you need explosions and other stuff to not do that there is something in Particle Illusions that I think is called reflectors or deflectors or something. If you place those below the explosion when rendering the particles will bounce when hitting it witch might look more realistic.