Three Scenes
Sky*the vast sky; Snow*the heavy snow; Laboratory*science fiction worldFive Equipments
Speed Up: Speed Up the Bullets
Strengthen: Increase Bullet Lethality
Split: Three Bullets At Each Shooting
Bullets Time: Slow Down the Enemy's Speed
Shield: Avoid A Attack At A Continuous Time
Others
To upgrade various properties, experience the process of growth.A large number of square arrays, find surprises everywhere.
