Don't forget to add a Git download link to the extension page if it's not available in Special:ExtensionDistributor.
You added to our description "KeyCAPTCHA is implemented as either an HTML5 or Flash object. Choose the option that best fits your intended userbase."
But KeyCAPTCHA detects the mode automatically.
Best regards, Maxim Vladykin KeyCAPTCHA
As long as you're not adding promotional stuff it should be fine to change things like that.
I think I've fixed that particular text a bit, but please feel free to improve it.