Very nice entry. I like the visuals and music but control is kind of confusing to be honest :). I don't know why you decided to use Z to jump. I think spacebar would be a lot more comfortable. 

And what is the purpose of allowing arrow controls? If Z is the only button to jump then it's impossible to fully control the character because you still have to use a mouse :D.

Apart of the controls, it's a solid game. Thanks!

Such a nostalgic vibe! I’m with Atremic on the Z part—since W isn’t used, maybe just map both letters to the same input and you’re good to go! The Windows build bugged out on the last screen, but I did reach the ending in the HTML version, so I still got to enjoy the outro music :)
Loved the music and the art! I’d definitely play more if there was a bit more polish and juice on the controller and a bit more content. Great job!

I would love to know how the game ends, but the choice of Z for jump just made it too difficult for me to jump. And being a platformer, that's kind of important.

I did love the graphics and the sound design!