Around 52 minutes to beat this shitty game. Control is deceptively bad so it took a while to beat some of the easy bosses, but was just tedious. The response of the bullet leaving your gun is very delayed and cant be fired rapidly, along with glitchy jumping. The only slight challenge comes from bullshit control and hit detection. I owned this game many years ago but dont think I had NES hooked up when I got it super cheap. I purchased it to re-sell, but it turned out to be worthless. I saw ShadowFlare's No Death run on his channel and decided to try it out. Check out his channel for some very impressive No Death runs.
This is the full unedited successful run. Believe I got it on my first full attempt after a 31 minute practice run through the game with save/load states. This game has limited continues.