Congrats on this one. I never managed to beat that SOAB.
It took me a bunch of tries and my thumb was hurting so I had to take a break. The bosses first move is that circle he does around you and I think that's the key to beating it. If you can beat the first part without getting hit you should be able to beat him. The pattern for the first move is a lot easier to memorize than the second part so just focus on the pattern for the first part and try to spin around and beat it quickly.
The second part where he has all the shadows also has a bit of a pattern and you can get a couple really good hits right at the beginning where his first attack he goes straight across the bottom, if you start on the lower left side you can knife him a couple times and shoot him all the way across the screen. If you pull that off then you can knock his second form lifebar almost in half.
Now it's time for you to beat BW 2 and BW 3...IN ONE SITTING (I allowed myself breaks...Le Lunch, Le pottee)...
Join the small club (not that it's difficult, it's just that folks move on to other games). I forget who did it besides me...maybe an old thread has the crazy tales (it may have been a different forum).
Blazing Lazers on "God of Game" mode is much scarier than anything Bloody Wolf offers, though.