Question about "save attribute"
I'm trying to make checkpoints for my game at the end of every level and i have a question about the save attribute feature. I have two save attributes that save both the x and y positions of my player controlled actor. When the actor overlaps with an area the player is prompted to save their progress and proceed to the next level by pressing the up button. In the save attribute section there is an input box for the attribute to be saved and then there is a "key" option. My question is about the "key" box. Can I leave it blank? If not, what am I supposed to put in there? These questions also apply to the load attribute feature as it also has a "key" option. Oh and I don't have the express version of GS so that means that I cannot test the save and load attributes right?