After you make the game you submit it to Armor Games. Then the mods will try the game to see if the game is good enough to be on Armor Games. If your game is good enough, then it will come on to the homepage where the new games are displayed
Fill out this form. It takes a few days for the administrators to test the games that are submitted then decide whether or not they deserve to be put on the site. Legit enough? Just browse through some existing games to see what to go for.