I have never been able to finish the game because the snow trucks are so hard to control.
That said, I do get your idea, it just needs some polishing. Rework the controls and make snowplowing more satisfying; maybe scoop them off the edge of the map or collect them in the back to dump them off somewhere?
The special object.. You could say it's the blanket of snow that keeps falling, a bit of a stretch but it could work that way