I'll look into what it would take and give it a go. I only started mod development recently, so I don't know what has changed since 1.12 in forge. I might do a limited functionality version for 1.12 so I'm not writing everything twice, but I'll have to see how much can be used as-is.

I've spent the last few hours trying to get it running in 1.12, and so much has changed since then it would be a fair amount of work to learn what all has changed and get it all working. Half the things I'm importing have moved or didn't exist back then. If anyone else wants to work on it then I would be happy to merge their PR request and/or upload it to curseforge (after reviewing it to make sure it works and there's nothing sketchy of course).

I may revisit this later once I'm a bit more comfortable working with 1.15, but I feel like I'm going to confuse myself too much jumping between versions before I have a firm grasp on how forge works in 1.15