It is and I think as you say one of the most difficult games there is. I had it in the physical NES version and then years later I played it in an emulator on my pc. When I played it again on PC I remembered the same feeling I had when I played on NES, it's an insane game and not very pleasant to play, a point where the difficulty and the challenge become absurd and difficult. If you play alone it is worse, with a partner one can get hours of fun out of this. I think that in both situations is what makes it an excellent game and of course a classic. Thanks for sharing!