keyle_xiao 启动场景 背包游戏 枪械的背包，买枪 结合割草游戏玩法 先不考虑适配问题 美术资源直接用现成的 POLYGON Starter Guide for Unity - (Tutorial) by #SyntyStudios 低模枪械 https://assetstore.unity.com/packages/3d/props/guns/low-poly-fps-weapons-pack-188037
