Like I said, I'm not sure a tooltip would be the best fit. For one, they can show on mobile in Bot Land when you press and hold something without letting your finger off of it. Also, while I'm not a UX expert, my view on tooltips is that they are good for information that users have a hard time remembering, but once you learn about the in-game documentation or the "help" button, then I don't think you ever need to relearn it. With that said, there is a UX designer behind the UI that you see in Bot Land, so I will likely consult him if I ever get to tackling this issue. I would probably go about it via other educational means like a tutorial, video, or section for tips somewhere in the game.