I see the game was removed ahead of the announcement on http://www.codenameentertainment.com/?page=idle_champions
I've been playing for the better part of two years and I'd really like to keep my account progress. How can I migrate my account if the game is no longer available here?
From the games support site-
Please log into your WebGL platform account (Kong, Armor, CNE Games). Write down your account-specific MIGRATION CODE.
Download and load Idle Champions on your new chosen platform.
Open the settings menu and select the 'WebGL Migration' button.
Enter the MIGRATION CODE in that dialog. That’s it, you’re all set!