It sounds like the key didn't save (maybe you quit the level before completing the room with the key). If you're on PC you can grab a completed save file here and paste it in -https://www.speedrun.com/katana_zero/resources …
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It sounds like the key didn't save (maybe you quit the level before completing the room with the key). If you're on PC you can grab a completed save file here and paste it in -https://www.speedrun.com/katana_zero/resources …