Hello,
In your move / touch event : Add a text “hidden” (text upon character or bool sent to widget) and a retriggerable delay with a text “not hidden”
To save infos, use a game instance : https://docs.unrealengine.com/latest/INT/Gameplay/SaveGame/Blueprints/index.html (and said recently, (thx Fluchs ^^) don’t forget to set it as default in project settings under maps & modes)