Hi sebrosen ,
I'm not very familiar to particle objects, but this really looks like a particle object with some properties edited to it to make it bouncy.
I've tried to make the same, and I was able to recreate everything done in your video, apart from the bounce, only using the particle properties, and 0 events, apart from the event that creates the particle effect on mouse click.
Maybe the bounce is just an advanced part of it, but this should help you a lot already !
Thank you, do you mind sharing the capx file so I can take a closer look at it?