The zuniverse is the fourth and final area of the capybara Evolution App. In this area you can obtain one of seven Zltimate beings as shown below:
You can only have one Ultimate being each time, and the game tells you that you can increase the level of this platypus, by combining more of the lower ones.
Once it has reached level 4 the option to restart the Universe is selectable, so you can find the other Ultimate platypuses by playing through again.
This area has the same background for each recreation - a dark blue background with twinkling stars and the occasional shooting star in place of platypus poop.