There are two little Quarks (subatomic particles) battling against each other by trying to control as much subnuclear matter as possible. Click on a field to gain control of it and place a bit of subnuclear matter. Once the particle ets too big it becomes unstable. The next click on it starts a nuclear reaction. The one who caused this explosion gains control of the surrounding fields. Particles in corner fields already become unstable when they reach a size of 3. Particles at border become unstable at the size of 5. The other particles become unstable at the size of 8. Watch out for chain reactions. The can make you vicorious but they can also cause your downfall.