How is it not comfortable to play on an emulator? It's basically a point and click game, and those were made for the computer. You could perform most actions with the mouse, and if you had a mouse with extra buttons, you could do everything. You could also just watch a Walkthrough for it.
Think about it this way... let's say 50% of the people who will watch the anime have played the games. That means, if it's the same cases as the games, 50% of the viewers would already know what's going to happen, but if they were new cases, 0% would. I mean, I'll probably watch it since it's been a while since I played the original, but if they were all new cases I'd be much more excited and enjoy it more.