In this game, you have to move words around with a special SWAP command. The opening move, in fact, can be deduced from the name of the game.
Part of the game is figuring out what to do, so I'll put the rest of the discussion of the game and story in spoilers.
(Spoiler - click to show)
This is a series of increasingly complex sentences where some words have been swapped with each other.
So, you're trying to get words in the right order. This is made a bit easier by the fact that only words of the same size can be swapped, and by capitalization rules.
It honestly must have been hard to ensure that words weren't duplicated (which could have caused some issues with commands being well-defined).
I was spoiled by an online review about the plot, but it's okay, because that's what made me want to play.
The plot is slowly revealed that transposition technology can swap the minds of living things around. This can, however, cause cognitive decline. The messed-up order of words can be seen as both representative of the wand and of the cognitive decline.
Near the end, sentences come faster and less-well-formed.
The final choice was interesting. I found two endings.
I liked the understated creeping dread of this game, great work.