Great GAME !!! I suggest you play as wizzard add MAGI and use replenish mp, so you easy move further down. P.S. when you go back to town buy the items from npc next to tavern.
For the Gold medals use this row: 1.Goblin 2.Shield Golem 3.Goblin 4.Healing Priest 5-6-7-8. Goblin 9.Healing Priest 10.Goblin 11 Shield Golem. 12. Goblin. Then use your spells wisely and u easy get the Hard Badge !!!