I don't understand the technical issue. Regardless of which token is used, you need a depository to interface between in-game and out-of-game (blockchain).
Since all of the M (CK/CKM/currency, whatever you call it) is currently in game, the depository (blockchain) wallet starts 'full' with all of the blockchain tokens (as if the currency started out of game, like XMR or BTC, but were all deposited). As people withdraw, the depository wallet pays them out on-chain.
As always, depository fraud or negligence is going to create problems. Multisig, good transparency/reporting, dividing the wallet between multiple custodians, etc. may all be good ideas.
Misread the following statement as CKO instead of CKG--so not a technical issue in comparison.
I would like to create an ERC23 token
For M with 4 trillion supply (3,999,999,999,706)
I'd have to contact PJ to see if it's possible to create a website simmilar to deposit.cryptokingdomgold.com
Since it is actually the ingame currency, it needs to be liquid and deposited/withdrawable automatically
Such a website wouldn't be necessary if we were creating a token for CKG instead of M
And that would be a lot easier and a lot quicker
@iluvbitcoins creating the tokens at that rate would be fine with a website similar to cryptokingdom.com.