Super fun little game and amazing concept. Had a few difficulty's and maybe some things to consider at the start.
So the way your game is set up is, you start and play the game. progress through the game win then rinse and repeat. With a formula like this i think you could simplify your start screen to better suit future jams in this way.
I don't think you need to have a separate button for controls. I think the only thing you need is "push whatever button to start" then show them what the basic controls are, then move onto the game. this will make it so the user wont have to look at the itch page to figure out what buttons to use when they launch the game.
The music in your game was really good but honestly was difficult to enjoy because the loop restarts each time you die. I would consider making the loop endless so that it wont restart every time you die and you can enjoy the full soundtrack.
nice job!