Absolutely amazing!
Your ability to come up with such intricate levels with increasingly complex solutions, all that in 48hrs is insane. I also love the music choice, art and the hilariously fun dialogue. I love the hilarious take on the demon king - hero dynamic where the hero is possessed and has to insult civilians. It fits well with the theme while turning a well known trope on its head.
The idea of linking the movement of both of them is comical and works really well as a mechanic when paired with a teleport mechanic. I also love how the teleport isn't just a "get out of jail " mechanic and is actually required in a decent amount of levels to either reach the end or just not die when guiding the hero.
If I had to complain about anything, I would say that the dash mechanic isn't as well implemented and I couldn't see the point of it being there even after trying to. Also the resolution button doesn't work as intended on browsers (but I'm sure you know that).
I can truly see this easily becoming a full game with just a little polish.