there are birches, cans and fire in game.
pull off birch bark, put it into can or pot put it on fire u get birch pitch.
pirch pitch is the first glue of the mankind, u can use it to build a improvised axe, (stone knife, birch pitch, stick) ore arrows, theyx should not be able to craft without rope or birch pitch, how should the fethers ore bones hold.
and much more it ise useable for.