Around 12 minutes to beat the final boss in this version, but close to 30 minutes on the PS3 version prior to this. That's where I got most of my practice. What made this original version harder than the PS3 version was that the lives are capped at the 3 default lives. In the PS3 version I was able to set lives to 5. I also was unable to pause the game on this TeknoParrot emulator (though there may be a way). The main issue is the final form which I dont know how to dodge MOST of the attacks. So I just try to get there with enough lives and tank the turret, point blank style. The hit box is really strange on the turret too. Bullets dont connect often. Full playthroughs of the Arcade and PS3 versions are up on the channel. Check out the easier PS3 final boss fight here: