alright, at the begin I was like OK there is no auto save... i can deal with it the game is good.... then... I left the game in afk mode.. i had 250+ energy gain... I load the same game and here it is -5000 energy ... well fcuk you and fcuk this game....
!! SPOILER !!
LVL 15 FOR NOOBS:
Just kill the bat right from the start, throw axe to the right and jump to the pit right on the ghost in the lower left corner, while axe will be returning it will kill the bat also dont forget to save yourself right before you hit the ghost...
 "Planetary Factory Idle"){kind=icon}
 "Choppy Orc"){kind=icon}