Monsters vs. Musicians

Background:

You begin in a band, traveling through space along with other civilians. However, on your journey, space invaders come aboard your ship and begin to destroy it. These monsters can’t be defeated by weapons or force. The only thing that drives them away is the power of music. To stall the monsters and allow time for the other passengers to evacuate, you, the band, play your way through the ship, defeating as many monsters as they can. The more monsters defeated before the ship is entirely destroyed, the more civilians get off the ship.

Goal:

Get all civilians off the ship before the ship is entirely destroyed.