Each punch is rated on a scale from 0-8000 points. The points awarded are based on a combination of power, speed and timing. An 8000 point punch would be fast, powerful and have perfect timing. The points from each punch add up to give you your total score at the end of each round.
Hitting many targets in a row earns you a score multiplier. The score multiplier increases from 1-6x as you hit more targets in a row. But beware, once you miss a target you’re back to 1x.