It really doesn't matter if your skills with drawing are awful to draw a fan or not. People would prefer visual clarity. It took me a while to understand what you actually mean.

Anyways. The same could be done with water already, and in maps where such a function can be added, water is already used instead, and it's better.

with the help of their idea, people can make modules

I totally support the suggestion, I always wanted to see new content to the editor and adding a new ground that adds more mechanics must be really interesting and would let players to show more originality while building their maps. I like the idea of changing the power of the fan, it must be useful for maps in where you have areas don't want mice to pass through using a 9999 power fan or just to make floating objects.
It could indeed act like a water when it is placed facing upwards or like a treadmill, but the concept is that you can gain/lose speed without touching anything and without changing the gravity or wind power so it would be really interesting

Support.

/support

/support