1. Pixpet Inventory
Game Menu -> Pixpets -> Pixpet Inventory

The Pixpet Inventory functions as an overview of all of your pets. Currently, there is space for 100 of them. From here you can place Pets on your Home Grid which is the black area to the right in the game. Pixpet Eggs will only hatch if you place them in your home. Once your Pixpet hatched, you can send it on a Hoard.

It is also possible to place Eggs on the Pixpet Market, release Pixpets or name them after they hatched.

3. Pixpet Overview
Game Menu -> Pixpets -> Pixpet Inventory -> Click on any Pet

This is a long one, but the most important part of the tutorial, so stay with me!

The Pixpet Overview page will display all information about the selected Pixpet. Once a Pixpet hatched, you can send it on a hoard, evolve it and get sharing links.

5. Item Inventory
Game Menu -> Item Inventory

The Item Inventory holds all items you own. The space is currently limited to 200 slots, however you can make more space by placing items in your home. There are many different item types which are devided into two main categories: Decorative Items and Consumable Items. Decorative items are used to decorate your home and increase your Pixpets Satisfaction Level (SLVL). Consumable items can be used by you and your Pixpets for the games progress.

11. Housing
Game Menu -> Housing -> My Houses

Your house essentially defines how much space you have for your Pixpets, pumpkins, plants and decorative items. Houses are divided into different House Parts. The bigger the house, the more house parts it has. Each house part can be up to 10x10 (100 tiles) big. House parts are divided into two categories: Inside and Outside which defines what items can be placed in them. Outside house parts like the Frown Yard and Backyard hold Pumpkin Slots. The number of Plant Slots is defined by the house type and can vary.

The number of Pixpets each house part can hold depends on the house part type and size. Some house parts cannot hold any Pixpets at all, like the Attic or Basement. Also, some houses have house parts which need to be bough additionally.