Currently, the novella is kenetic and has no choices. They will appear in the future, but for now, if the narrative isn't to your liking, I recommend waiting for the version with choices. A version with choices is planned for after the main story is completed.
The game is still in development. Currently, the game's choices are in the "prologue" DLC, which previews what the game will look like in the future. Full-fledged storylines will appear after version 1.0. In the future, players will be able to choose how Sam and her friends' fates unfold. The current storyline is one of the future storylines, which is the true and most correct ending.