Firstly, I LOVE this game. Its amazing… But, how the hell do you do the boss on stage 4? The skull with those indestructable ships always shooting at you? I’ve tried “moving around a lot” like the walkthrough says on here, but I always end up getting killed. Any ideas?

Take it slow. Focus on firing on him for awhile and then switch to the health replenishing ship when needed. Depending on your dodging skills it may take awhile, but this strategy is pretty surefire.