I like the shrink better, because they can still see you,
which means they come after you, yet they rarely hit you.
Anyways, try to start near the green pickup, and then head near
anyone you see; it seems to be luck, because of the fact that there
is no radar.
Just make sure you have the shrink or invisibility whenever you can,
and don't be scared to get in a fight with anyone, as with shrink,
they have less than a 1% chance of hitting you, and with invisibility,
they won't even go after you.
There is a blue speed pickup, which is completely useless,
and then there are two important pickups; a green
Shrink one and
a yellow Invisibility one.
With the invisibility, they don't see you at all, and tend to run
right past you, making you sometimes have to chase them.
Once in a while you will find yourself in a crowd of
people, firing like a madman and picking up coins like crazy; other
times you will find yourself running about, hearing people die, but
finding yourself in the middle of nowhere.