Click on an egg to hatch it (you need some money to do this). Click on one of the black equipped pet boxes to equip a pet from the red unequipped pet box. Click on the delete button to delete a pet in the red unequipped pet box. Click on the level button to level up (you need some money to do this). There are 5 rarities of pet: Common, Rare, Epic, Legendary and Unique. The first 4 rarities are found in eggs, while Unique pets can only be got once and are from levelling up.
Warning, this game is currently only open for beta testing. Nothing gets saved here. Please comment to state which pets are Too Strong or Too Weak so I can balance them for a later version. Other suggestions are also welcome. This information is for the Scratch Team - DO NOT FEATURE THIS, this isn't the actual game. Wait for the real thing to come out if you want to feature it.