gaming on the blochcahin is one of those, already on the way
I looked more narrowly at that trading card game of Moonga (and its site), and, alas, there is nothing beyond just using the Bitcoin blockchain as a payment system for buying additional cards in the game itself (as an option). This is not what I would call gaming on the blockchain, just like it is not gaming on MasterCard if you happen to buy some stuff in a game through that payment system...
EverdreamSoft is now accepting to be paid for any of their services in bitcoin, the revolutionary currency
...
In Moonga, users start playing by downloading the game for free. To progress, complete their collection and improve their game strategy, players can chose to buy additional cards, either using to the points earned in games, tournaments or contests, or via the Shop where the card boosters are for sale at varying prices.
So it seems that you got too deep into the illusion of taking wishes for facts