Thank you for playing and providing the feedback!
The “change units” option was added near the deadline as my friend pointed out that there is a high change of soft-locking the player without it (as they might make a big mistake, forcing them to start the game over again). Since it’s just a little jam game, I though it’s easy for me to allow a 1-level re-roll.
The card selection is awkward. :D The closest thing to a card re-roll is “surrender” during the battle, “retry” after you won the battle and “continue” after you lost the battle.