At least when replying to the posting user's thread, I guess that he/she would get notified too (btw: never noticed a feature for pm'ing a user here, just following/subscribing to their profile or bookmarking specific text-threads only?)

Sounds cool while I don't use mobile-devices, so playing android-games couldn't be tested, I guess. But I could offer connecting with me on discord and you could play it and I could submit my suggestions / noticed typo or bugs or also ask for getting to alternate paths in-game (if it's e.g. an RPG-game with different options for choosing), etc.