As you can see, you have all the normal things like a title (name of your game, preferably) as well as an embed code and other such things like that.
Also note that there are 3 category sections. As gamers we know that often times one game doesn't specifically fall into a single category or genre, therefor, it would be disingenuous to give you only a single category to describe your game. We want you to be able to slot your game into up to three categories which should give you the opportunity to select something like: First Person Shooter, Puzzle, PC. Just as an example.
We'll be refining this process as things move forward, but this will probably be how it works in the beginning.