I really don't see why you want him to play Blockland so bad that you'll take to trying to get the message to him through, like, five different methods of communication or whatever.
It really wouldn't change much if he did, and at the rate you and everyone else has been going I highly doubt he's going to want to even look at this game, you've all pestered him to stuff and are doing nothing but hurting your chances by persisting.
Seriously, just let it go for forgets sake