I got the boss. the trick is: 1. the rocket phase - go up to the top left or right untill the rockets get to you then dive underneath the rockets and go to the other side and do the same. 2. continuous spray - this is the hardest part - you go up to the very top left/right corner and stay there and hope it stops before it kills you. 3 & 4. big/small spray pattern & phase - easiest part - stay up in corner and they wont even hit you. You should probably have all upgrades and use the laser just to let you know.
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