Games made on Pico8 always amaze me because of the huge restrictions they have but they can still create quite atmospheric scenes.
As for the controls, it feels quite good, it's just to get used to the grips and when to lunge, but the save point system means that even mistakes don't cost too much, which is fine for a short experience like this.
Without a doubt, it is a curious metroidvania in which we have to explore and understand what the abilities we receive are while our character stops being more and more human to save what is left of that destroyed world.