Ask in the forum for the game or contact the mods directly. Much more likely someone who knows the answer will see it that way.
I wouldn't expect a game to appear on speedrun.com before it gets released. But I could be surprised.
@607 Demos/Pre-released Versions - Demos of both fangames and official games are judged based on their merit as well as if it is logical to track them. For example, we may not see the need to track the demo for a title that currently has a game listing for the full game on the site. Typically we would suggest you send these requests to the moderators of the game in question, as they may add it as a category and avoid the need for an additional game listing. These are dealt with on a case-by-case basis, and we will judge demo submissions sent to us with the same criteria as all other submissions.