In order to play Lock and Load, each player gets to build their squads using their purchased NFTs. Each squad has a maximum number of 3 heroes, but you can also play the game by owning at least 1 Mouse Hero.
Your Mouse Heroes will automatically roam around the castle and destroy the spawning chests they encounter throughout the level. They will search and destroy the chests until their stamina runs out.
A tired mouse is a lazy mouse so make sure to send them back to the Campfire whenever their stamina runs out so they can comfortably recharge their energy more efficiently. If you forget a tired mouse sleeping on the floor of the castle they will also get some rest, only not as efficiently as the ones in the campfire.