The message that appears in all released versions of the game is "You've got the key!", we have attached the screenshot belo, not the one showing on your screen. The message you're seeing was only used in an older development build while we were still working on the game.
From what we understand, it looks like you might be running the game through Ren'Py (the development software) instead of the released build. That could be why an older, previously coded version is appearing on your screen.
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