The small hero walks around the closed road and fights on their own. Your job is to place cards, equip dropped items and decide when to go home. For a first expedition, place only a few enemy cards, check your health and return with materials if the next circuit looks risky. You do not need to defeat the boss on your first run.
The screenshots show the PC layout. On Switch or Xbox, the same named panels are present, but the button used to select them can differ. Read the on-screen prompt on your version before confirming a card or a retreat.






