Thank you for the detailed feedback. I didn't know about ctrl+w before submitting, I would fix it now to run with shift, but I'm not sure if I'm allowed to after submission (this is my first jam), I will definitely fix it after rating phase is over.
Coyote-time would be a cool (I think Celeste does this, right?). I have to think of a way to implement this. Good argument about the falling and then having to reset. I will have to rework some levels, I don't want to frustrate the player.