"what's this energy thing"?
Energy in Demigod is like Mana, or using a Sins analogy - antimatter
It's used for all abilities.
"where is my life meter?"
The green bar to the left of your Demigod's portrait. The blue bar to the right is your energy.
A few other notable buttons:
- Bottom left of the Demigod portrait is the skill tree button. Clicky to see the skill tree and there will be a count of available points in the top left (1 point per level-up).
- Bottom right of the Demigod portrait is the stats button. Clicky to see all the numbers - damage, attack speed, armor, speed, hp/energy, equipped items, etc.