I made a very simple FPS controller as a sort of example cart to build off of. This is just to get you going, as opposed to a full framework around which to build a full game. Hopefully it serves as a good jumping off point for someone to make something fun.
It uses player 2's ESDF controls for moving around and SPACE for jumping.
EDIT: Here's a very heavily commented version! Probably way more comments than usually necessary, but it's intended to help you learn, rather than just briefly annotate what's happening in the code.