Before doing anything, I think that you should talk to a lawyer because there are a lot of questions to be answered. Who owns the code? Are you free to open-so

Before doing anything, I think that you should talk to a lawyer because there are a lot of questions to be answered. Who owns the code? Are you free to open-source it or rebrand it? Did you have any kind of contract?What about your employment situation? Did your meetings with Sparrow's staff, and them sharing artwork, constituted some kind of licensing, agreement or anything? Did Google know about your project? I'm not a lawyer, so I don't know any of the answers. Does anyone know what would happen if they claim that they own the code? Maybe they would have to recognize him as an employee, or a contractor and then pay him for his work. If they allow him to use the code as he pleases, the fact of the company encouraging him to develop the port, and even meeting and sharing some artwork, would it mean that they granted him an implicit licence? Either way, probably Google's legal team has some work to do.