Lvl 58: I tried a number of options. Big laser, slow time and lightening worked for me. slow it down whenever you can, move into the groups of yellows when slow and unleash lightening. Laser just used when backing off when charged.
Enjoy this game, one I come back to. Kids - stop with the silly chain letter shite, your just scaring yourselves - there is true horror out in the big bad world but none of it ever originated in a chain letter. They are for very stupid people
 "Heavy Weapons"){kind=icon}
 "I Love Traffic"){kind=icon}
 "Battalion: Ghosts"){kind=icon}
 "Frantic 2"){kind=icon}
 "Gravitee 2"){kind=icon}