I think that experience in shipping and experience in maintaining a project is largely different. I'd rather work with someone who has maintained one live project, rather than with someone who has shipped 5. Especially on mobile. Shipping a simple game is not hard. Understanding how much you have fucked up with load times and fps is valuable. Understanding why certain technical and architectural decisions are wrong is valuable. I have rewritten big parts of the game just to fix performance issues even though the team has shipped 5 games before.