my device is a Motorola e22.
My RAM size is 4GB and my screen is 1600x720
maybe the problem is my RAM ??
The fireworks use a particle system based on the CPU, I couldn’t test this on a variety of devices, but it might be possible that some android devices will not have capacity to handle the particles.
I can’t confirm for now, but I’ll try to make some further investigation on this. I believe the 4Gb of RAM is sufficient, but I’m not sure :/.