I fully agree with Max but also add that the end enemy was a little confusing. I somehow expected it to be some "interactable" character and ran into it, expecting a dialog or something. I was also half-expecting the bamboo to hurt me (but then realized it was too tall and was probably just a prob. Kudos for having the character going thru it - I've noticed the effect!).
Those are just minor points that could be made more explicit in future versions.
Another point to add: tested it a FPGA core (MiST compatible) and the game hang shortly before starting. Did you get the chance to try on real hardware? On emulator it ran just fine.