I kept the design relatively simple, but is chat apps go it is very vibrant. The logo design was my inspiaration point for the design of the interface elements. I had the idea that this app could incorporate a "tabbed" system for navigating through the sections. It seems that the 3 areas that would be immediately necessary were "Chats", "Friends", and "Topics", but I can imagine other tabs that could also be incorporated as well. I also added a simple UI Kit here for good measure.
As it is, this design is intended to spark interest and conversation about the idea, as outlined in the brief. Please let mellow your thoughts!