Charged Salvo

Description
Whenever Commander Rocket isn't firing, he automatically stocks up on rockets up to a cap. Pressing the fire button unleashes all the stocked up rockets in a burst, dealing a fixed amount of damage, multiplied by the amount of rockets fired at the same time. Holding down the button allows him to fire one rocket at a time as they recharge. Rockets fly in a straight line until they reach maximum range or collide with terrain/enemies and damage enemies in an area upon exploding.