I just got minetest today, Very fine game, Lots of potetional, And I have a couple of questions which would hopefully get answered.
1-How do you eat food?
(more questions to come...)
Smelt a rat (found underground or under trees, left click them) in a furnace, then right click using the cooked rat on the ground, then right click it again, you will gain 3 hearts. Please note that when you die, you don't lose items, currently.