Really cool game, and a clever use of the theme.
I feel like 1.5s is way too short of a time that you can be off blood for, it felt like I could be in the middle of a patch of blood and move to a slightly less bloody area and it would be game over before I could react. It might work better with a more forgiving duration, or have it so it slowly eats away a health bar rather than instantly kills you.
Otherwise it was pretty cool :)