I can see that your free version contains the link to the paid game. So, that might be the problem? But I’m just guessing… Hope it gets resolved.
Saw other developers doing the same thing and had no issue having their projects indexed; also there is no rule prohibiting promotion of other products. I spent a lot of time trying to figure out the problem myself and found that I broke none. The deindexing was probably triggered by frequent bug fixes I did on the latest project but I can not be sure of that. Thanks for trying to help tough.