I had fun playing this -- nice work! I like the art style, and you get so much out of few pixels -- the pig's and chicken's expressions, for example, are great. The superjump is difficult to get the hang of, but I got better at it and I've never seen it before, so that's great, too. A few bits of feedback that I hope are helpful: (1) I never realized that you could destroy enemies by superjumping on their heads until I had played level 1-1 many, many times -- and then I only did it by mistake. I would definitely require the player to learn this in the tutorial. (2) The background music played in level 1-1 on my first try, but then never again (the game was silent except for sound effects). (3) Consider ramping up the difficulty more slowly. Level 1-1 is very challenging right away. Nice work on this!!