I have bought many things what tech points and I'd like some help. I have lv. 3 farming, lv. 2 Construction, lv. 2 medicine, lv. 2 fertility, lv. 2 Science, and lv. 3 Spirituality (I got lv. 3 from saving a whale ) I have build two huts, unlocked the lagoon, unlcoked the graveyard, and can now fish. What else cand i do with these tech points?

The lagoon will play a part in two puzzles.

You havent gotten level 3 on everything?

There are puzzles to be solved that require level 3 in some of the techs that you don't have.