Edit: New high score, 7539.45.
Also, to further explain, you get 3 red boosts that knock you up, and a rechargable blue boost that knocks you down. You can tell which will be used by the color of the word 'AERIAL' under the menu.
The different people have different effects. (I'll identify them by the color they are boxed in.)
The yellow guy will change your angle, the green guy slows you down, the red, blue, and yellow girls all boost you (low-angle, 45 degree, high angle respectively). The green girl stops you, and the purple girl does nothing when you hit her, but blocks the effect of the next girl you hit. (Tho if you hit a guy, then her block goes away.)
When the picture of a girl is lit up and you hit her, you can get a special if you click fast enough. Also, if you get a special while the purple girl is blocking, you get a special effect. Not sure of all of them, but I know the one makes you like a super ball so you get a boost from hitting the ground.
The info can be found
here.