What fun idea do you have for Balatro ? It can be anything: a joker, a game mode, a challenge, a card...

My random thoughts:

• New secret hands: Flush Four, and Flush Pairs (A flush Two Pair). You can only play them with the Four Fingers joker.
• Otherwise, Flush as a modifier rather than its own hand. For example, playing a Straight Flush would give you the chips and mult of both a Flush and a Straight.
• Card themes, basically skins for cards (or even jokers). It could work like minecraft texture packs.
• A deck that uses tarot cards as playing cards. Each tarot card you use is added to your deck. They would count as their own suit, their number is their rank, and give mult instead of chips. Some are face cards, but it's related to the symbol rather than the rank (The Emperor...).