Closed Fists is a simple but tightly designed 1 v 1 fighter that relies on intuition, reading your opponent, and luck (or subterfuge.)
I don't think I can emphasize enough how well explained this game is. It's all smooth, stuff doesn't repeat, there's even a flowchart right out the gate.
The writing's super engaging as well, and it startled a laugh out of me at one point.
I think as optional changes, I'd recommend picking 2 Techniques at the start of a match (to allow character builds) and instead of rolling your Hand, spend 10 points to build it out of three or more dice. This makes it less about luck and more about build + mind games, but the game's also plenty fun without making any changes.
It might also be worth having Techniques be played face down, and then revealed with the dice, because otherwise if someone openly declares they're using Juice (+3 this round, -3 next) there's nothing to stop their opponent from just hard countering it with Fortune's Reversal (1s are high, 6s are low) assuming both parties took those Techniques.
Overall, this is an excellent bite-sized game, and kind of perfect for camping, journeys by train, basically any situation where you've got five minutes to kill and a flat surface between you and someone else. I would absolutely recommend anyone who likes fighting games (ttrpg, card, or video) buy a copy.