I found this goes for more games, always try reading the Readme file(normally I'm
too lazy for it too), for me at least 48 hours didn't allow to put in much ingame
explanation, and I've seen that goes for others too.
For those lazy readers who still want to understand my entry:
RED are BAD and BLUE are GOOD. So use the blue ones to kill the red ones.
It's not that hard :)