Hey!
First of all yeah, artstile is gorgeous! The floppy discs, the textures, the pixelated ui of the jump everything is looking aesthetic af! Especially the blue fog, i dunno im always down for that
I feel like the window of a jump is too short, I got good at it by the end tho, but still there were some platforms that i couldn't pass. I think the main reason is that I get too concentrated on the ui for the jump instead of the platforms themselves. On difficult sections I only look at the UI because I need precise jumps. Maybe create UI a lil bit more integrated to the game screen so the player can see both of them at the same time? Or I think it could caused by the music/jump interval asynchrony cuz I primarily hear music and I'm trying to adjust my jump timing to the music and my movement rather than jumping interval. I think jump interval should be integrated a lil bit more with the music or movement adjusting to the current situation. There were times when I was doing my perfect jump session but had to stop cuz I failed and had to wait for another jump interval to come, I felt like it kinda killed the flow of a perfect run, which, when it works, feels perfect!
Anyway really enjoyed your game. I think with that aestheticand gameplay you can carry on and release it one day!