The unicorn should be fat, cute and funny. I don't want a classical illustration but more an outline kinda minimal design. It should match my official logo colors palette at least in the main shades of the illustration. I would prefer an horizontal proportion of the illustration, so the character can lay on the top of logo if necessary.
Update 1: I invite you to submit a pattern with your character as well together with the stand alone sketch. Even a simple one is ok. A pattern is mainly what the unicorn is created for, so it's very important to me that it works in that kind of graphic environment. It is not mandatory of course to submit a pattern and I may choose your design anyway even without it, but seeing one will help me for sure to choose the finalists.
Update 2: Please try differents positions for the unicorn. I had quite enough entries with the unicorn standing, so maybe submitting a laying, laying on the back, sitting, curled (like a cat) or dancing position would be great!
Update 3: I was thinking that a nice funny factor to add could be putting in the design some funny pooop. It can be rainbow effect (not rainbow for the colors, but more like a wake following the character) or a different solution!