If you're thinking of inviting Julie to review your game, it sounds like you want something very complete and almost ready to launch. So it really depends on what you want from your game and what you want players to test! That way you can get a strong review from her.
Think about what you need in terms of Pets, Exploring, Quests, Social Features, etc and take another look at what games Julie has already tested and what sort of features they had already to really give an idea of what the game is about, and how that worked in their favor as she reviewed them.
The 1st of September is literally at the end of this week, so I'm not sure how much you can add/change until then. If you don't think you're ready, maybe have your Alpha and then wait until your Beta or when things are more polished before inviting a reviewer.
(I have no idea how much is going on with Kinderpets, so I'm not saying you aren't ready - I just don't know!)