Hi Josee,
Collecting the termites is optional, as are all the foodstuffs. As long as you have enough food of whatever kind to keep Mina and Jep's bars in the green, you'll be ok.
As for the pointed stick, double check the area where it was originally located, perhaps you missed picking it up first time around.
You'll need to be playing as Jep in order to do this.It's located in the area just before you descend down the steep path to the beach (where the lasers in the sides of the wall are). So search the grassy area before that as Jep, and hopefully you should find it.
