Coin minigames exist, which can make the player receive a certain number of coins depending on the coins found in this game. (mariowiki.com)
There are also shorter challenges where the goal is to hit the ball through a series of rings or collect a certain number of coins in only a few strokes. (the-games-blog.com)
You hit a certain number of coins within an allotted amount of time, and advance to a more difficult challenge with the same rules. (snackbar-games.com)