Damn, a month already passed ?
I like the game, it's pretty clever. But even I noticed the double age thing in the 'dry run'. That's not really a mistake you would make, when playing your own game.
That being said, this Zero project could potentially drag on for a long long time. If we have to wait for a month on a chapter in which they only explain the rules of a simple game, the founding of Fairy Tail 95 days from now, will be somewhere in 2036.
I also noticed that the outdoor panels were much more detailed and like they gotten more attention, and the indoor panels half way through the chapter, were bigger, and lot's of white in the background and more sloppy art. It seems as if Hiro treats this as a side project and draw a few panels whenever he has time.
I hope Mavis will end this game in a way befitting her 'strategic' nickname with a good question or answer, and not some cheesy loophole.
Also it's an evident lie that he will show her the fairies, so when she will ask him if he is going to hold his promise to show her the fairies, he has to reply with no.
If he says yes, and lies, he will lose the game because the magic will rat him out.
If he says no, he speaks the truth, but he would have lied to start the game and there is no reason for Mavis to play in the first place.