Quite nice and well balanced, if you are lucky enough to build a bakery fast enough to make enough food, then just send everyone for materials and place Shelters to regain dead Cultists.
But yes, it is quite harsh at the start, when you have not enough supplies, 25% Lethality feels too much. Maybe you should lower it to 20%.
Overall, it is the one of Best games in this Jam I've played so far. You deserve a high rate.