You know you cant just steal assets from a commercial game and post it on github right? afaik github may not only close that repo but also close your account. Not worth the risk if you built any kind of social identity around your github account.
It's not a parody.
It's apparantly for educational use (AngularJS) but not every educational use is fair (could have easily used different sprites).
It's a straight up copy of artwork that's copyrighted and trademarked without any doubt.
Its use of copyrighted art is not limited to a small percentage of the work, it's 100% of it.