Unity 2D Shooter Bullet and Weapon System v1.41，很棒的弹幕插件

所支持的Unity版本：5.5.2 及以上版本
The 2D Shooter Bullet and Weapon System asset provides you with a highly customisable bullet pattern and weapon system, custom weapon configuration editor with inventory manager, along with a bullet pooling manager which is simple to drop into your Unity game or  project and start using right away. With so many options to tweak and customise, you can create endless combinations of bullet patterns and weapon types, with top performance, even on mobile platforms. In addition, you also get a customizable player movement sc ript which allows for multiple modes of player movement controls (top down shooter, shoot-em-up/shmup, and target tracking for usage of the system on enemies as well as players), as well as a multitude of extra sprites, SFX, prefabs and demo sc ripts relating to the 5 x demo scenes that are included.