We just launched a place where you can upload and download custom Spluzzles made in the game's level editor. We had to host it on our website for technical reasons--we hope you'll understand!
Go to the Custom Spluzzle Library
It's brand new, so there may still be the odd hiccup. If you find any (or don't!), we'd love to hear from you on our Discord server.
We also want to thank everyone who snagged the game as part of the 2018 Yogscast Jingle Jam. Thanks to you, over $3 million was raised for charity.
Enjoy, and happy new year!