You will attack enemies automatically when you will be close enough to them.
A weapon type accords to the distance between enemies.
Close – Shot.
Closer – Laser.
Closest – V Beam.
V Beam will be fired when a V Beam power is 100.
V Beam power will increase when you get close to enemies.
When you destroy 5 enemies quickly, you will get a combo bonus.
(Or when you destroy a enemy after your weapon quickly hits enemies 5 times.)
If shields is lower than 3, shields increase by 1.
If shields is max(3 is max), you will obtain 100 score points.
When Shot or V Beam hits enemies, you will obtain a 1 score point.