OK, this is brilliant. So many different games, and all of them playable with a twisty knob. It made me wish I could use the controller from one of those ancient analog Pong consoles!
The music is upbeat and addictive. The transitions come so quickly, I can hardly tell which way is up, but there's always a break in between so I can catch my breath. So good.
My only suggestion would be a bit more feedback (visual, audio) as to whether or not the player was successful at each challenge.