This game is probably the most unassailable classic game ever, but it's not the best. I think platforming is a genre that has been explored pretty thoroughly since this game came out, and hundreds of games have evolved from this one to make some great stuff. It's good and fun, no problems, but Mario is the template for every platformer you've ever played, so it won't be very exciting. You should play it anyway though, because as I just said, it's the template for every platformer you've ever played. It's good to have perspective.