[mpalmer]

Wow!

I really like the way it encourages you to play with the equation UI early on, teasing how powerful the system is without pressuring the user to accomplish anything.

The interface is clean, but more to the point it's intentional and specific in its design. It's a great learning tool; it feels like my mental model is stretching already.

Home run across the board! I wonder if the creator has played or knows Logical Journey of the Zoombinis. I see a similar attention to storytelling in a silly but melancholy vein.