Thanks for the amazing template! It works great in Chrome and saved the day for my project.
I was wondering if focusing the canvas element after entering fullscreen mode would help Estecka's issue. I noticed for me as well that after going into fullscreen you need to click on the canvas element to resume the game loop.
Would be nice to have the auto-detection working. Does adding the "width" and "height" properties in the style attribute of the "gameContainer" div work?