Can't get past the grid fireball puzzle. I've been stuck for two days on that. I saw mentioned something about a top left switch- I've tried all switches, nothing works.
Assuming you mean the part with yellow circles on the floor before one of the lanterns you need to light: calodemon wrote a response above - you have to step on the top-left circle to disable one of the other fireball-triggering circles.
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Assuming you mean the part with yellow circles on the floor before one of the lanterns you need to light: calodemon wrote a response above - you have to step on the top-left circle to disable one of the other fireball-triggering circles.