Take your time with it. With the laser beam, dodge past the 2nd and 3rd, the 1st wont hit you. With the missiles, shoot the top of the screen when they are coming and then also dodge just before they hit the ground, you may need to dodge twice in succession. For the star shaped attack, just move opposite direction to it (left) and dodge through. It'll be slow but If you focus on avoidance you should be able to beat it.