Wow, really nice animation, and the premise seems interesting. It kinda plays upon game lovers as well as those who may like some action and maybe even a potential dark story? Looking forward to seeing how this turns out.
Other than that, really glad to see that the opening theme made it into the first episode. Heard it announced and performed live by LiSA herself at Anime Expo, so I was hoping it'd be here from the get-go.