Thanks! Pushed a refactor. Good catch.

        if self.moving_backwards:
            self.body.reverse()
            # Also reverse the direction vector
            self.direction = (-self.direction[0], -self.direction[1])
        else:
            # When switching back to forwards, reverse again to restore original orientation
            self.body.reverse()
            # Restore direction
            self.direction = (-self.direction[0], -self.direction[1])

I don't think I need to explain the potential refactoring.