OK, I see the K badge...
Start by clicking the link up there under the big red headline [url=https://cityoftitans.com/content/now-released-avatar-builder-and-second-chance]https://cityoftitans.com/content/now-released-avatar-builder-and-second-chance[/url]
Scroll down a bit, you'll find a link just before the second image, buried in the text where it says, "You'll find it [url=https://store.missingworldsmedia.com/]here.[/url]" Click that.
Now at the top of that next page, under the cookie monster's message, you'll see some statistics and two links. You want to click the one that says [url=https://store.missingworldsmedia.com/accounts/signup/]BECOME A TITAN[/url].
Now follow the instructions on that page. Do not forget to use the same email address you used for your Kickstarter account. If you no longer control that address, pm one of the devs. If, after you finished filling out the form and clicked through to the store area you don't see your correct backer level, then pm one of the devs.

Good luck!