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would mean something like "From time to time, we find that we doubt ourselves". The intended meaning here, I think, is that we _should_ doubt ourselves. Something like
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> At times we should doubt ourselves
which comes from "let's doubt ourselves from time to time", but "let's" sounds kind of strange in English.
You've told us nothing about the video game, so I don't know whether that makes sense. Probably it doesn't make much sense for a car racing game.
For the Legend of Zelda games, this does make some sense. The start of the body copy you added says that, even when you think you've figured it out, you might try your idea and find that it doesn't work as well as you thought. So "From time to time you should doubt yourself".