Here is the full map in ITTA game, hope this full map will help you.
Map guide
Here is the full map of the three areas with markers for all boss, weapon, health and beast locations.
Credit to Crowspike
How Long is the Game:
It depends on the style you play, it will take your roughly about 2 hours as a casual player, without the whole searching for stuff.
ITTA is an adventure game that follows Itta, a girl who wakes up to find her family deceased. Itta is guided by the spirit of her family’s cat. In ITTA, the player explores the world and battles bosses. Different weapons can be acquired with unique attack styles for different combat styles and different enemies.