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.
But yeah, the URL should really be versioned.