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Blue Crystal is a twin stick shooter with time attack elements.

Crystal

Clear the target time and collect crystals.
In total there are 120 crystals in 40 stages.
You can play more stages by collecting crystals.

Weapon

There are six weapons.
There is only one weapon at the start of the game.
You can use more weapons as you advance.
If you can't clear a difficult stage, try using other weapon.