问题拆分
The common mistake is describing a complete crossover instead of a single player decision. That leaves camera, physics, saves, and level scale undefined until the implementation is already tangled.
记录预期结果和第一次失败的位置，并确保每次修改都可以撤销。
实践步骤
Choose the base camera and input first. Then express the imported mechanic as a local state change: a heat meter, a shield, a building zone, or a timed traversal rule.
使用原创占位素材和离线测试环境，开始前先备份。
验证与记录
Run the same room with the imported mechanic disabled and enabled. The comparison should reveal a different decision, not merely a different skin.
记录版本、步骤、结果和恢复方式，形成短小的现场笔记。