You can use the Challenge Points, which can be earned as you progress through the stages in the [Challenge(Minigame)] content in the lower righr corner of the main screen.

Four types of minigames are available in the Challenge content. When you obtain a certain Dice, it will be automatically unlocked to play.

Minigames can be challenged with Discounted Points once a day. The discount resets every day at 00:00 AM (UTC+0).