You absorb black particles which is good. Destroy red particles by colliding them with the black particles. You grow as you absorb and destroy.
Destroying red particles increases your power meter. Click to use a power bomb to destroy red particles near you.
And the only way for a sick score is the power bomb combo. Destroy 2 or more red particles at once using the power bomb to do a combo. The more you do, the more you score.