RandomOutput Thx, for your input. I know the WebStorage Plugin well. I have been using that on all my games I did the last two years. Now I have a RPG game and it is quite complex to save all the monsters right. I am just lazy on that and the build-in save/load game works fine for that. At the end I will use arrays+webstorage again but I think checking for "savedgame exist" like the local storage for example has it might be a keen missing feature.
I will just add a local key I will save if the user has/hasn't saved a game so I can grey out the "continiue"-button.
btw. This is the game I am talking about: