28 Votes in Poll
You can find the code I used to program it here: Custom cursor | Customize Your Wiki | Fandom
The image for the pick is in the images tab under the name pick.png if I recall correctly.
If you’re interested in contributing, refer to the current events tab on the wiki. It contains a list of things that can be done to improve the wiki. There’s also a link to that list on the main page. Of course, any ideas beyond that list are welcome too.
I've seen younger wikis with less activity than this one. As long as there's still things to do, I'll be around. K-ON! still commands a startling following given its age. Most of those people just aren't interested in editing for the wiki, and there are other places to have conversations about the show/manga, like the subreddit and discord server.
The image used for the custom cursor can be found under the images tab for the wiki and is currently the first image on there. I can't help you with coding it to work for your pc, but that's where the image is.
28 Votes in Poll
The only downside to having unnatural names for images is that it makes it harder for the images to be found for use in other pages where they should be used, since a reader won't see the png name at a glace. In the case of these images it's not a big deal, but I'd recommend reuploading images that could be used on multiple pages in the future, for the sake of those creating new pages or adding to pages that need galleries.