Consider playing basketball with a shorter shot clock. Improvisation on offense might become more important, not having time to set up plays.
The result might look like Run and Gun, if the defense also plays that way (though they probably won't).
It would also be easy to make the length of the whole court shorter so that the (usually boring) time it takes to bring the ball up the court doesn't consume so much of the now more precious shot clock. The time line, now a single mid court line, would becomes two lines, each line keeping its current distance (47 feet) from the far baseline.
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