I loved that there are several secrets in the levels, it encourages exploration in the game and gives more time to try it out. Possibly the only flaw I see is that several jumps are very tight, but that adds a certain level of challenge to the levels, making you think a bit more about how you are going to perform your maneuvers. Other than that, everything else is very well done. The graphics are very nice and give the game its own identity, and personally, I really liked the work done with the audio. The game truly feels like an NES game and is quite entertaining and fun. Good job.