Quite an interesting idea, and a well made game considering you used Pico-8 :) I found interesting how now you can get invulnerable but glitch everything around the character permanently, it is a very curious trade off, like using the limited but higher jump.
Really liked the animation on the sea at the bottom too, it really seems more intimidating now.
I would suggest changing the game's thumbnail, since it makes the game look kinda sloppy in my opinion. A gif where some frames are glitched would be an interesting thumbnail! Also, I felt that the character was a bit too heavy, making the platforming kinda hard. Maybe that was intended though.