Hi @scorer,
we do love the Steem Keychain extension as much as you do! :)
But for now it isn't possible to use for our game. There are a few reasons for this. Most are of technical nature and how we handle the blockchain in our backend. Furthermore there is no Keychain available for mobile, which means we need to use Steemconnect on mobile. (Or we save the private keys ourselfs, which would be a suboptimal solution).
Since we couldn't use it for mobile we figured it wouldn't bring that much benefit to use it only for the website.
Right now we are working on the finishing touches for the game so you all can enjoy the best experience possible but once everything settles we might add a Steem Keychain login to the website for that bit of extra security.
Greetings,
-@mwfiae