Excellent start, I'm excited to see where it goes. I love that Rune isn't a self-insert for the player. It's nice seeing an MC who just gets shit done.
Quick little advice though. Maybe you should toss a flashing lights warning at the fight with Nana. Just to be on the safe side. If there is one and I missed it, just ignore this :D.
There is an epilepsy warning at the beginning of the game, but you're not the first person to mention the flashing lights or suggest a warning. I imagine that has to do with conditioning and people being trained to ignore disclaimers. Regardless, I can see about putting another one in somewhere before that scene, or simply making the first one more obvious or something.
