MikalYoooooo this is awesome!
particles don't have rotation, so each would have to be assigned one color from the large image - a photograph image may not work but some pixel art might well be ok.
You know... technically both are pixel art, one just has more pixels. But I know what you mean. One thing I defenitely would be intrigued by is how many particles I can throw at my computer before it explodes. I guess a HD image won´t work that well, considering the 2 million particles that would be.