How can I save position of sprite in webstorage, is it possible? So it's in the same place when user comes back to the game, until he or she movies it again.
You have to set 2 keys: "PlayerX" and "PlayerY" for exemple, in the local storage, set to the player X and Y respectively
then when you load the game (conditions of your choice, a button maybe), you begin the layout, and at the start, you set the X of the player equal to int(WebStorage.LocalValue("PlayerX")), and for the Y, the same but with the Y
the manual should help you too: