Don't worry about it

I'm going to post an updated version of the game demo soon, just adding one more thing. My main character's voice actor had some microphone issues that have been resolved, so I'm going through the higher quality files and adding them in.
For anyone who played through my demo, would adding an autosave (that can be continued from by the title screen) be best in the room where you pick a stone color or should I just put it in the last scene? At the moment the stone you pick doesn't really matter but once I get the puzzle rooms drawn up and added they will behave differently. As DEshini said I probably shouldn't make people play through the whole demo just to see the two endings, so I figured the same logic would apply to the stone colors as well.