The particles are plains, which move in 3D space. They always face the camera.
You can color them, fade them, use images as particles, change their life, quantity, direction, spread and lots of other things.
Then you can add effectors...turn them into cyclones, blow them with a wind, add gravity, change their size, color and transparency over time, get them to flock to a point is space....
And finally you add colliders. When the particles hit colliders, they can bounce, stick, disappear, change color, or trigger an effector.
You can acheive all sorts of effects, I'm working on a showcase, I'll try and speed up a little!
BatVink