This is the french forum, but here is the answer to your question:
We currently do not have a partnership with fortnite, so we do not have any game quests. However, if you download the game and play it, you can then interact with players on the Bananatic page for the game: https://www.bananatic.com/fr/jeux/fortnite-349/ or on our discord server. You can also write an article or submit a video about the game to win some bananas :)
If you would like to buy the Save The World edition of Fortnite through Bananatic, you can buy it here for 18 000 bananas! https://www.bananatic.com/fr/search/?q=fortnite
Hope this helps!