I'm sorry that happened to you but it is part of the game experience. We want it to be a hardcore game where saving and loading takes up resources so you have to play with care and are always on the line. It makes the whole play experience a lot more exciting!
If you are lost there is a walk-through-guide video of the demo here: https://youtu.be/RTTYtASUCxI
I hope you make it and enjoy the game! Don't forget to read all the diaries before the very end!
Thanks for your support and interest!