Estimated 3 hours 46 minutes to beat. All the challenge comes from an EXTREMELY CHEAP final boss. The rest of the game is very easy. I was playing with a joystick initially which is not my usual control method for fighters. I was unable to change controls mid game, save or pause the game on this emulator. For those reasons it took longer then it would have otherwise. I had to replay the full game once to get back to the final boss again, on another session, which I then completed the game on.
Lost matches edited out. Notice sometimes the enemies have 1/2 health. These were enemies I lost against, allowing me to enable that assist in the next attempt. Despite using this on the final boss it still probably took over 3 hours alone.
Missing stages 4 and 5 in the footage. I had to replay the game another 1.5 times to fill in all the footage that kept dropping. This emulator seems to cause conflict with my recording device and I kept losing chunks of footage. I had to replay the game several times to patch all the footage together. In the end I settled on missing 2 of the stages, since they were not any harder than the other easy stages. I did not count the replays that were footage related as part of my completion time. As mentioned, the final boss is the only difficult part, but for the wrong reasons. It kills you super fast, pins you down with projectiles and anti-air type moves and does massive damage as well as blocks nearly every attack.