Now that I tried to work a bit better the android version, you're right, on choices, you can press left part of the screen (Actually it was not even default, so I make it default that now).
But as last resource, you can go to load, and "auto" it saves in every single decision, so you can always go there... but it's true you can go back before those decisions... Hmmm...
Thanks for your comment, it was really useful ^^