Hello Mark Brown! I have just finished your demo. Here are my comments.
- "Aha!" isn't just about figuring out a difficult puzzle. It's about discovering a way to bend your brain in a way you've never bent it before. Figure out what it means to "think with magnets."
- Ideas for inspiration: Draw some magnets. Draw them in different styles. Doodle them when you're on the bus. Carry a notebook with you. Study the science of magnetism. Buy some magnets of your own to play with. Look at what sort of different magnet toys are out there.
- The movement feels good. However, the sort of artifacts where you stand on the edge of a platform and slide off feel bad. It's little and it's probably due to Unity physics, but if it's easy to fix it would be worth it.
- What is it like to change polarity? Do you feel different? Do you become a different person? What's your relationship to your other polar?