You are looking at the shaft.  A large red block, four units by one unit, 
is above your head, dropping slowly.  It has its long edge horizontally 
aligned.

>turn the block

I don't know how to "turn" something.

The block descends lower.

>rotate block

The block rotates in mid air, now with the long edge vertically aligned.

The block descends lower.

>move block left

The block shifts to the left.

The block descends lower.

>drop block

You aren't holding the block.

The block descends lower.

>move block down

The block drops into the narrow gap, filling the four columns.  The 
columns flash twice, then vanish, dropping the blocks above them down.  A 
musical tone is heard.

[Your score increased by 20!]

A square grey block, two units by two units, is now overhead, slowly 
dropping.

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