I have been doing lots of updates to the game off the main branch that are MILES from being ready for prime time, expect lots of MSpaint and broken features, but if that is your cup of tea, the branch is called debug and the password is " bugbearsaysyes ". You can access it under game properties (right click) and under the beta tab. If you don't like unfinished/unpolished changes I would advise not changing branch. I will be updating this branch primarily up until release, where I will switch back to default branch.
Major changes includes redoing the tutorial section, a (somewhat) playable storymode (Yea I know, still not finished, prob a week or two out still) and versus online mode, because, why not. Also 26 and counting achievements.
Enjoy.