Further reading

• Coroutines are a specific type of method in Unity that allows you to spread tasks across several frames instead of running them all at once like a normal C# method. For more information, check out the documentation at https://docs.unity3d.com/Manual/Coroutines.html.
• PlayerPrefs lets you easily store preference data in string, float, or integer format between game sessions in Unity. However, this system is not encrypted, so it’s not recommended for storing sensitive information. I’d encourage you to check out the documentation for a deeper dive, at https://docs.unity3d.com/ScriptReference/PlayerPrefs.html.