Cool puzzle game. Some of the early levels were kind of easy to just randomly jump through, but the blue blocks introduced an extra level of depth that dispelled that problem. It'd be cool to see this expanded with more mehanics beyond walls appearing and disappearing, like moving blocks that only move at certain frequencies.
Other than that, I also had trouble with the slow tuning. My first reaction on seeing the knob in the intro was that I wanted to turn it with my mouse, but after playing the game I'm not sure if that would work too well.