I love the visuals and the sound is pretty good. Also the overall idea is very cool. But it's too difficult. Getting hit comes with too big a penalty, combined with the very strict time limit to find your next kill (especially as a human), you just run out of enemies you can use to rank up. The timer is the real issue, as even just reading the text takes long enough to level down again. I restarted every time I ranked down to skeleton as there just wasn't enough enemies to rank up. After a few restarts I was too frustrated to continue.