It was really fun when you were getting into Gyromite
Deep from my memory... there were 3 modules for gyromite. One was 2 receptacles for the rotating pieces placed on the left (to let them rest), one was the motor to make them spin placed on the right, and the other one was 2 arms pressing on the A and B buttons of controler 2 placed in front. When a disk was spinning it could lay on one of the arms making it press the buttons you wanted and with gyroscopic effect stay there for some time (hence the name, gyromite).
On screen, in normal mode, you controled a doctor equiped with a remote controler. Pressing select would make him enter in robot controle mode in wich you could issue oders to the robot (open and close arms, move up/down/left/right). When ROB was making pressure on A button it would make red columns obstructing the doctors passage go down, B would make the same thing with blue ones. there were deadly monsters too you could kill with the columns.
In sleepwalker mode, the doctor would just walk forward with an autoscrolling background and you only controled rob. You could be trapped in dead ends, or kill your doctor because the disk fell by lack of rotation. I loved this mode.
Like everyone, ROB finished as the mighty guardian of my lego imperial space station on the verge of beeing anihilated by the wreckless lego rebels (man i loved my hand-crafted TIE-fighters -far before the official lego starwars stuff-)
edit: man you gave me great flashback here, constructing heavily armed space cruisers for hours and destroying them in a minute in a pieces fireworksiyeaaaaaahaaaaaaaaa (i filmed some of them on my dad's movie camera, wonder if i still have some on old cassetes)
..sinister looking, .. or .. sad in some ways.. 
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