It’s a cool effect but would be better to go front-and-center with the source code. Asking people to embed random third party scripts on their web pages is a security bottomless pit.
The URL is not versioned, so it will break whenever OP makes an update (which is arguably a good thing, but we really need OP to provide us with a versioned URL)
Luckily, your snow effect is not mission-critical. So even without the versioned URL, I'd probably take the trade-offs; the snow effect might disappear, but at least I don't give some random person arbitrary remote code execution permissions on my website.