Aaah! The aesthetic is to die for! This looks amazing, and the music and sound effects fit well. Perfect example of making what appears to be relatively simple assets just explode with life; if I'm being completely honest, the general vibe of this game just makes it for me.
Conceptually, this is really cool as well. Not sure if I quite get the "retro" connection, but maybe I'm thinking about it too much. The pixel art and feel of the game are sort of retro on their own.
Some of the platforming was quite difficult for someone who is terrible at platformers, like me. I think the controls maybe felt a little wonky sometimes. I think at least that releasing the spacebar at different speeds giving your jumps more or less height would have been nice. Then again, it might just be because I am so terrible at these types of games that I'm looking for something else to blame, haha.
Overall, really, really cool game.