Just made this deck, so far doing very well in casual (i know thats not saying much)
the idea of the deck is to mulligan for your early minions and basically try to do as much damage as early as you can, and if it goes late game, you have savanah highmane/ dinotamer brann/call of the wild to hopefully finish your opponent off. You also have zephrys in case you need to get rid of some taunts or something to kill you opponent.
Against paladin and shaman i'd def keep hungry crab. eater of secrets for paladin also
warrior/rogue def keep golakka crawler in case pirates
and mage, if you can mulligan for eater of secrets, your chance of winning that match skyrockets.
have fun, and may the odds be ever in your favor.