Since the rules say you need to post any personal libraries you will be using, here is a class I use a lot that I may or may not be using. It is pretty basic, it just makes rectangle collision a little easier.

I hope you can understand my spaghetti code.

Here is a link to the .java file on my github page:

 http://minibutmany.github.io/CollisionShape.html.

Happy Ludum Dare!