Hi, have you ever seen a forum somewhere that is an app? An app has to be installed, etc. That doesn't bring any advantages. only cons. Or ..  what advantages do you see? Why an app?

Good morning , 

Let's try to do the analysis. The difference between a site (of games like Flyordie) and any application.
The website is always indicated by its interaction with the content (text, image, form….) on the other hand the application is defined by the interaction with the interlocutor.
I hope this will help you understand.