Mechanic like lower death rate or respawn will depend on how many will participate.
Although if your concern is the story was short, then don't worry. It was meant to be short. I had already decided the three phases the story will had.
Beginning, mid point and end.
The mid point had set of puzzle that intentionally designed to lower down the player till 1-3.
What I said above was not related.
What I mean is, this was a experiment, I wanted it to be short. That is why the characters were simple with no highlighting personality or hidden motives.
This time I am planning to add more to it.