Got some players working in my game engine. Also added a "take screenshot" button since printScreen doesn't work in game.
Screenshot with 2 playerObjects facing different directions:

Screenshot of my stuffty menu (no GUI yet, just press N to generate a test room):

The Spritesheet I used (ported from hammerwatch beta):

Players can't move yet, I manually positioned the ones in the picture.
I also added controlObject code. That means that there's always one specific object that responds to the arrow keys - it can be a camera or anything.