Really good game, I had a ton of fun and it is lot of content for what seem to be a solo endeavor. The gameplay, while not intuitive at first, because I kept dying when the control completely flip over, is a really good take on the theme. Only thing I would add is that when there is a major shift, to put a warning arrow in the direction that the player need to run after the level rotate.
The pixel art is well crafted and polish, sfx are well used. My only problem with your game is that there is no music, could of use a temporary placeholder that is open source. Any 16 bit action tune would of work and sold the experience 10 fold.
Anyway, Great job ! It's really is a top contender.