You can try this fork @Jagster:
URL: https://github.com/Arkshine/discourse-fireworks
branch: mobile-support-and-settings
Click on Advanced button to provide the branch name here:
Mobile is supported, and I added a bunch of basic settings (particle count/size, firework width/height, and fall distance) for both desktop and mobile.
I will consider making a proper PR (and eventually other settings) on the original repository later!