I like the speedrun of this game, I'm still routing it out and improving my overall movement, but I already got a sub 10!!!
Very nice, I think my best time so far has been around 8 minutes when testing the game. And the zombie that spawns after picking up the key in level 3 is designed to basically be impossible to get past without being grabbed, although you may be able to get past him if you have perfect movement and position yourself in a certain way before exiting the key room.