While I appreciate that the game is much faster now... I wonder why you not simple kind of cached the players interactions and simply wrote them into the BC a few seconds later.. and then verifying again with your cached games status... then the game would have been quicker and could still be fully on steem..
I believe you should at least print the important assets: upgrades and future token balance into the blockchain. Then even when you are hacked or a bad developer of yours wants to destroy the game by erasing or altering those information.. you can always reset with the imprinted status in the blockchain..