If you like me now have the function where you can double-tap on a booster, and it activated on its own, without needing to be matched.
In case you didn't know (like me), you don't need to wait for a booster to light up, for you to be able to activate it with a double-tap.
You can do this with ANY booster on the board. I didn't find out until yesterday. Of course you can't decide what color the Sprinkle ball or multicolor ball choose, by doing this, but if you're in trouble, it can stil help. Especially being able to click any fish, to get a bottle.
Just be aware that a double-tapped booster still counts as 1 move.
I don't feel like it was made clear that you can click any booster, not just the one that the game highlights, when the notice of this new help was announced in my game. Actually I needed another player to explain to me what they meant with the double-tap.