Definitely not an easy hack. The first and fifth levels were quite easy, but the rest were hard. Hardly any check points or power ups, tight jumps while dodging fireballs and stuff, and trying not to fall down a pit or into the deadly sand. I'm no SMW expert, but it shouldn't take over an hour to finish 7 levels in an easy hack.
Graphics aside, the level design is actually not that bad. It's definitely very rough, and it's occasionally a bit hard to tell what is and isn't part of the foreground when you first enter a new level. You got some decent ideas though, they just need a bit more work I think.
...okay the graphics are pretty awful, and the decision to only give the raccoon tail after you cleared the hack is pretty questionable. (It doesn't add any replay value whatsoever as it just makes it easier instead of harder.) However, I think there's potential if you put more time into making your levels look nice and working more on your ideas. I liked the castle the most. 3/5