Around 1 hour 53 minutes to beat. I beat this on the third full attempt, after a practice session of the full game using save states to practice specific sections. The practice session took a little over an hour to go through the whole game, then I started making full attempts. Mostly easy to exploit with a few tricky sections. The main thing is to avoid being sandwhiched or you can be comboed to death. The game is short but doesnt replenish all your health between rounds and only gives you two lives to beat the game. If you lose a life you go out to the continue screen and are sent back to the beginning of the stage you were on. I will post up a tutorial with commentary on this one to break everything down. Its been a while since Ive beaten an NES game, but this one looked pretty easy in a video.