Added Deathlock to itch.io site instead of external

While I was putting Nox Dies up (not available for public download yet! But it has been uploaded here and it will go public in just few days!), I figured I'd also get Deathlock sorted for this site instead of an external site.

A lot of you have shown interest for the demo, of which I'm happy! Thank you for all your support so far, make sure to leave your comments to let us know what you liked/didn't like <3