Not sure if this should be classed as a, a tip or a spoiler, or a _bug_. I was very close to losing everything on my game the other day. I had two adults and two children and very little food. One adult was a female chief, so for a while she spent most of her time pregnant, but the problem was food. So I put the kids on picking mushrooms, and for the fun of tried to get more than one child to pick up the same mushroom (like you could in vv1)
I discovered to my surprise that when you get the hang of it, it is quite easy to get two mushrooms, by pausing and bringing both children up to the mushroom, dropping one onto the un-pause and drop the other one onto exactly the same place at the same time. Doing this with red-caps gets you seventy points, and if you are really quick you can get three. I haven't done that many times but it can be done.
Then I tested it with the collectables, and it's amazing how quickly you Tech Point can increase. I was able to totally revitalise my tribe which had shrunk to nearly nothing, so if it's a _bug_ I must say it's a useful one
