I like the music. It could loop better.
I kinda wish you could shoot diagonally. I imagine they'll be upgrades or different weapon pick ups as the build progresses?
Are you supposed to be able to get outside of the map? There's a book case in the top right corner of the house I just walked through (you can shoot it too, I see) and I got on the other side of the walls and walked around the map.
I didn't get hit my first play and killed everything in the house- I guess nothing is supposed to happen, yet? I reset and died on purpose to see what happened. The slimed animation is nice. I look forward to seeing more ghosts/creatures. The thing in the shrubs was cool
Kind of reminds me of Zombies Ate My Neighbors (loved that game). Keep going, man. I'm sure there's a lot of ideas you have yet to implement. Seems like a good foundation to build on.