This thread has been lacking updates, so here one is: Ultimate Spleef is still in development, and a lot of progress has been made. For about another 11/2 more months, I will be quite busy with things other than Sponge. You may not see many updates on this page or on the GitHub page, but Ultimate Spleef is still being worked on.
I’m still working on the core functionality of the plugin. As it evolves, I plan to add different game types, powerups, and more. See the planned feature list on the original post.
Ultimate Spleef is now in heavy development and the GitHub page is being updated! Note that all features will not be available in the first release of Ultimate Spleef, and will be added in the future.
It hasn’t been worked on in quite some time, I’ve been busy with other things and this project is currently a low priority for me. Someday I might finish it.