I loved the creativity and the story of this game, but that was about it.
I had intended to go pacifist and I did only kill one monster in my entire playthrough, unfortunately that was the first encounter, probably the worst monster to kill; before I became familiar with the game mechanics.
I really hated the playing part of this game, massive difficulty spikes combined with not knowing what you were doing in boss fights was a real drag.
Keyboard controls were annoying for this game, I used to use the arrow keys for most games up until only a few years ago and I forced myself to learn WASD, it's painful to go back.
I guess most people hated the puzzle parts at the start of this game, they weren't hard and I thought they were fine.
I wanted to like this game, and I did get something out of it, but I can't say I'd recommend it as a game to have fun with.