Sounds good. I will play if I don't have to do any identity verification stuff beyond HIVE (eg, email address) and I'd highly recommend integrating with Keychain for log-in if you can.

If you have people promoting tournaments on HIVE and running on HIVE they'll probably be able to make their fee from upvotes. A number of relatively benevolent whales might even sponsor new on-chain gaming activity with some fatter upvotes. Good luck!