Thank You for the kind words!
You need to aim for the crates to get a new random tool, which also refills your durability counter. Moreover, getting new tools adds +1 to the maximum durability you have, so aiming for crates is important early game.
It seems that due to miscommunication, this mechanic was left out of the description by one of our team members, I’ll update the description!
Thank You again for trying our game, it really means the world to us! :D