I have seen several people asking about a JF tourney, often wondered why no-one was doing one as it's my favourite game.  There is a very good reason for this, it is due to a technical problem.  I asked Grab about this and the reply I had is below.  My thanks to Kate M of Grab support for the info.

Some games such as Jungle Fruit either do not record scores in tourney mode or display an error when attempting to post a score or simply do not play at all when tourney enabled. We are terribly sorry about this, Jungle Fruit receives an error code when attempting to post the score.

So, unless Grab can sort it, we are out of luck.