Hey. So I was going to make a simple tutorial series awhile ago, and just prior to typing the first tutorial up, I quit, LOL. So, I probably won't give the simple tutorial series anymore in lieu of the Python, 2D filter, etc. tutorials. So, that means that I'll release the source code here for others to learn from.
This simple game was coded using logic bricks, just to show how the BGE works. The package contains multiple parts, from simple input to a pretty full-featured game, including enemies and pick-ups. There are some things that I would change, but it works alright for a quick example set. Download the basic tutorial source here.