Incarnation

Make your way through the small interactive intro. Pick up the butterfly.
When you wake in the town, be sure to check all the cupboards, drawers and chests that you can find for items and money.
You can find a door key in the drawer in the same house as the locked door.
You can find a chest key in the sink at the inn.
You can find a locked chest in a secret room behind the bookshelves in the house on the right of the village entrance.
Before you leave town you'll want to visit the Grocers (in the West side of town), the Item Checker (top floor of item store), Scroll checker (East side of town) and Bar/Guild.
Be sure to pick up all the quests at the Guild and talk to the green-haired girl once you get all four of them for your most precious party member.
If you've looked everywhere you should have enough money to hand in the Need Money Fast quest. This will net you some more items and let you get the Help Book by interacting with it next to the Guild master.
Double check the Weapon/Armour store for any upgrades to initial armour and weapons.
Head to the East-most forest. You'll have a small cutscene pointing out a herb. Grab it and keep an eye out for the other 11.
To the North is a resting spot that you can use over and over again.
If you make your way through the forest you will eventually find an area that is darker tinted and spawns mainly roosters. To the West of this map is the locked room. DO NOT LEAVE THE DUNGEON if you intend to complete these as it will reset the monster counter and you will have to do it all over again.
To the North of the forest is a city and a mountain. DO not go anywhere else as they are yet to be made.
Head to the city, upgrade your equipment and visit both the bar and library to learn more about PCs quest. Then head to the bar and follow instructions. Then head to the mountains if you want an extra challenge. There will be no more real content beyond that point but the Meras Mountains are completed, including a boss battle and hidden treasure room.