let me start off by saying that the music is really good and catchy. but most of the game-play is just really unfair most of the time. either there are jump you cant make or enemies that immediately hit you if they're on screen for just half a second with their fast bulled, meaning that you get a guaranteed hit. if there wasn't a overly long invincibility frame I think this game would be impossible. on the other hand, the pixel art is really neat. but it seems weird to me that you chose for a sharp-animated explosion and button. it makes the game lose it's '8-bit charm' and it's just wasted potential.
other than that, it's decent.