Possible to have the snowflakes go UP (backwards) or a certain direction?

[dylanh724]

Currently, flakes fall from top to bottom:

Since you can customize the color which opened imagination beyond snowfall, it would be cool to have it go towards a certain direction -- or to be minimalist, just go opposite direction (from down to up).

You can make the flakes red and have an "ember" sort of effect, or many other creative possibilities.