My vote on your submission is arguably the highest vote I ever gave. the limited palete was good, but music wasn't silly enough so I didn't give you 2 stars there.
this could also be more polished by adding checkpoints and remaining lives, and also a button to mute the sound, cause it can be annoying. so I gave you a 4 in Polish.
Game feel 3, cause in terms of difficulty, you could get the player accustomed to the system and game play first, and only then make it harder, this can help to make the players engage further into your game to a point they actually beat it.
all else, innovation and immersion, 5 stars. keep it up!