When a level is selected on the Estate Map, a grid with the four possible weather conditions (clear day, rainy day, clear night, rainy night) will appear. If the icon is a minus sign, it indicates that you have not completed that level under that particular weather condition. If the icon is a checkmark, it indicates that you have completed the level under that weather condition and have also found all available secrets or clues. If the icon is a question mark under a magnifying glass, it indicaes you have completed the level under that weather condition but have not found all the secrets or clues. Sometimes a level will be marked with a question mark on multiple weather conditions. This indicates that a secret or clue is undiscovered that can be found in any of those conditions; or there are multiple secrets to be found in each weather condition. If it was the first possibility, playing the level under any condition and finding the missing secret or clue will change all icons to a checkmark. If it was the second possibility, getting one checkmark will not change the others. You will have to replay during that weather condition. Keep in mind that certain secrets can only be discovered during particular phases of the moon. If you are having difficulty finding a secret, try again during a different moon phase. Disable the location services option when waiting for rain. The in-game "weather machine" can only be used to change either the time or weather for a short period of time with every phase of the moon. When waiting for rain between weather machine uses, disable location services from "Advanced Settings" menu, exit the game, then start it again. This will change the weather to "Blackbird Estate" which may be different than your current local weather.