It is mandatory to switch your weapon, so that you either:

a) 1) use the bow in the tutorial 2) switch to another weapon for at least one map 3) equip another weapon for at least one map

b) 1) use the bow in the tutorial 2) keep the bow for at least one additional map 3) switch to another weapon

Reasoning behind this rule is to keep it an actual category, where you cannot submit other full-game runs