That was pretty good, definitely glad it was 13 episodes and not 12. They probably skipped a few bits, one thing I noticed lacking was the explanation for the guns, which is because he realized he can emergency produce apples and pears which are from his world, he can do the same for anything else.
Seems like the story would be all coming to a head with various games and their cliches in the future, if there is a second season.
I hadn't thought I was going to watch anything this fall season, and then I saw this was airing and... I still wasn't sure I was going to watch anything, but then I watched the PV for this and, holy heck the animation quality is off the charts; and after watching the first episode, holy heck the animation quality is off the charts. This might be worth it just for the fight scenes alone.