How to get BANANAS!
You can get a random banana within the game's current Pool drop every 3 hours. getting one common banana normally and one rare banana every 18 hours.

Points to consider:

[1] They are not cumulative in the sense that if you wait 9 hours you will not receive 3 bananas but only one, it could be said that you get a rare banana for every 6 common ones.

[2] When it's time to get your rare banana, it will not replace the common one, that is, you will receive TWO BANANAS.

[3] The game time runs even if it is closed, it is not necessary to have it open 24:07 to obtain the drops.

[4] If it happens that when you open the game after 3 hours it does not give you the drop, try waiting a minute or closing it and opening it again.

[5] It is good to pay attention to the news related to the game and or in the Discord since in those places they warn of changes in the Pool drop and about upcoming events where they will give limited bananas that, believe it or not, there are people who buy them for good money.
Extra data
There is an in-game market where you can buy exclusive bananas... I don't know why you would do something like that

If you want to participate in the community, you can join the game's Discord and leave your ideas about more bananas there so they can be added to the game.

(You can join the Discord from the game store page, I don't leave the link so it doesn't expire)