Uh... it's a 404 error. You know, "page not found"? Most likely, your games are still in draft so only you can see them. Check the publishing status at the bottom of the edit page.
Unh.... A lot of game developers do in fact post a lot of details about how they're making games. The folks at Id software made all their engines open source, and those contained all kinds of advanced tricks for their respective eras. What exactly do you think I'm going to steal? I don't even do 3D. At all.
By the way, interesting combination, I don't often hear of the Havok engine being used for 3rd-party games. But no, I meant pasting a screenshot and a blurb of your game in the release announcement, not just a link. It's right there in the posting rules, and helps people decide if they want to click through in the first place.