50 points for each second of correctly pushing the joystick left to push your opponent.
100/300/400/600/700 points for each object you light up above your opponent's head on a counterattack.
50 points for each time you push left after getting a power up and freezing your opponent's action. This may become 100 on higher levels, but it never goes above 1000/2200 depending on the opponent.
400 points per second for winning each fight, in increments of 40 points.
50000 points for catching the money bag (after fights 2 and 5).