Pretty cool. Not too hard, but not too easy either. I was going to suggest something like a timer on some of these stages, but then the battery (or whatever it is) started popping up on the stages and that effectively did the same thing. I still think it could be a pinch harder, but that might just be me. Perhaps somewhere in the 20-30 minute range--I think I was near the latter, but then, I'm getting tired and lazy, etc, etc--is about right for this game.
 lol That's right. Forgot that Jumpman was Mario's original name, before he actually was really named. Actually, I also forgot to mention that I may have half expected a little something close to another old computer game when I first started playing, even if I was also not at all surprised that my hopes were quickly dashed. Oh, well. (You should look it up. It's actually really fun, and I do think at least one of the games is a freebie due to being a fan project / remake.)