Potassium is a level editor for Super Monkey Ball 1 and 2. It may possibly support Deluxe some time in the future.
Right now it is very broken. Don't try to use it for anything.
Don't
LibGC (The VS solution includes the LibGC project, just clone the LibGC repo and fix the reference in the solution)
You might want to wait until this project is a little more stable before jumping in. If you're still interested in working on it, send me an email at github@trashbyte.io. Since the project is so disorganized right now, I need to make sure anyone working on it knows where I'm headed. Don't just make a pull request, I'm going to ignore it unless you've talked to me first.
GNU GPL Version 3. See COPYING.txt for the full license.