The same thing seemed to happen to the game I just published too.
Also, my game isn't a paid game, so I don't think it's waiting for review like the other posts have indicated.
Yeah, it wierd because i remember publishing a game like half a year ago and the second it was public, it was visible on the site
go and manage your game then click "Edit game" on the top bar, go to the bottom and in Visibility & access there should be an option to change it.
Which game is this? I can take a closer look to see why it was delayed.