Shinjuku Hearts....more like....Shinjuku Showdown

Assuming you haven't done it already and that your referring to the SYN Lab delve, you find the level 2 key card by entering through the dark hole in the saferoom on floor 2, it should be there when you make your way across the pipes and reach the rooftop. The backrooms becomes accessible by unlocking a little AI assistant that gives you the mission to go to the backrooms after completing the SYN Lab delve, the one your currently doing.

Nah I kinda agree, if it had the ability to choose a difficulty and if this was one of the harder difficulties then I would understand but you don't even get to choose that, the encounters are way too sudden and quick, if you don't stealth you fight again after barely moving down one hallway and even using stealth only really increases the tiles you walk by a bit, also while I understand it's a dev choice, I despise the mechanic of having to reach a bed to save, always hated mechanisms like that in games, other than that, this game has a lot of megumi but I do hope these things change on the full release of the game (I believe this is only the demo?)