Dream About Zombies In Dark Basement

I was playing a video game about killing/surviving a bunch of zombies. There was easy medium and hard mode (they were named something else, but I can’t remember) and I kept picking easy—which actually wasn’t so easy. Each round started with me going down the stairs of a basement quickly and seeing a ton of zombies in it, then I would shoot at them as they chased me. A little bit after playing, I accidentally selected the medium mode, and, if I remember correctly, the only difference(s) was that the place was a tiny bit darker and maybe the zombies were a little faster. I think I ended up dying almost immediately in that one. ~2 more rounds of easy later and I accidentally select hard mode. In hard mode, the zombies are faster and the place is noticeably darker. I was freaking out because I was hardly able to see anything besides tons of the zombies’ slightly glowing eyes, and I pretty much kept shooting at anything I could. Eventually, I ran back up the basement stairs while they followed. I was running through the house in a panic, slamming doors as I looked for a place to hide. I ran to a little room, quickly closed the door, opened it back up for some reason, then ran into a large bathroom and tried to hide in a shower with a door made of glass. Since I was freaking out and the zombies were chasing after me, I fumbled with the door for a second, then panicked and just stood right beside the shower as the zombies barged in. The first one to see me smiled, but his entire demeanor was relaxed and not-hostile. He walked towards me (rather than ran) and just inspected the shower next to me. A moment later, about 2 other zombies noticed me, but I can’t remember what happened after that. The end.