There are 2 types of pickups: orange and green.
Green affects your player.
Orange affects other players.
There are 3 kinds of orange:
>> = speed up other players
hand = slow down other players
big triangle = make the other players become huge (up to 3 times)
There are 4 kinds of green:
coil = force field, allows you to cross over trails without harm (but not the edge of the playing field)
hand = brakes player
small triangle = makes player smaller (helps you escape from tight places)
>> = speeds up player