Meh, I have noticed that usually, the creators of games release their games on other sites before AG. With some new games I look up walkthroughs when I get stuck. It will be here either tommarow or the next day. Well thats my guess.
It might still be going through this phase were it is still being checked and determined if it is AG material. Therefore its probally submitted, just has not passed judgment.
If it is not submitted, the only person who can bring the game to this site is the person who created the game. If you wish, you could ask the author themselves if they submitted the game to AG.