Has anyone beaten Snake Rattle n' Roll for NES?

Honestly, has anyone ever beaten it without the aid of Game Genie or another game "enhancer." I beat it with Game Genie with infinite lives. The game seems like it would literally be impsosible if I wasn't cheating. The later levels are insanely difficult. The game even took forever to beat with game genie because of how hard it was to control your snake in the ice level and how long the last boss takes, as he is constantly regaining health.