I had a lot of fun playing this. I do think that Orutai killing you in one hit is a little unfair. I died twice and both times were from getting distracted for a half second and Orutai hitting me. On my first attempt, I lived so long that enemies stopped spawning. I'm not sure if that's intentional to encourage dying and going back to the beginning but it was a bit odd.
With that said though, I got really engaged and loved the strategizing aspect of this game. Overall, I enjoyed it.