Really good! Nice art, nice sound, very polished platforming mechanics (I know from experience how hard that is to do in a game jam) and a fantastically fun rotation mechanic to top it off.
When the game started, I thought I was going to dislike the global countdown. But I like it. And I love the sun getting bigger and bigger in the background, it created a wonderful feeling of suspense.
It's maybe a little clunky if you're moving around while it rotates, but hard to fault you for that. Very well done!