I love this effect, really cute. I would add more movement to the star geo maybe spinning? it also feels a little weird with it never being in the center of the effect eg. it everything could be moving towards it instead of a few cm below it.
The effect goes outwards most of the time, I would recomend that at the begining everything goes towards the center to add more emphisis to the moment it pops! but that's just artistic opinion and me nit picking a bit :)
Overall fantastic work!