Just like above, but you'll also gain access to incremental updates as we are working on the game. Plus, you will have a special debug mode that allows you to modify various parameters of the game engine.
Everything above, and we will thank you by rendering your beautiful visage as a quality portrait done in none other than Microsoft Paint. Additionally, you can play around with the level editor that we wrote to develop the game. If you show us something neat you made, we might be willing to put it in the game (credited, of course).