Smooth controls, nice feeling weapons, looks good for its pixelated artstyle, runs well, good audio design. You will know if you like it just from some screenshots, or if you've just played Blood (or similar games).
Fun easter eggs, non-intrusive story.
But
I just didn't really enjoy it. I didn't like the level design. Not from an atheistic perspective, but from a gameplay perspective. For some reason I found it to be lacking fighting, and when there were fighting the combat encounter were so samey. I am not saying there isn't a fight behind every corner, it's just that when I think back I don't really remember combat encounters, I just remember the walking between environments looking for items. Some odd platforming, some stupid trial and error switch puzzle. I just wish there were more "battle arenas" or similar. I just found it lacking in enemies and good fighting spots, for a game that is supposed to have it as a focus.
I played on second most difficult option (I didn't like being one-shot), spawn only with scythes, and it was too easy for the majority of the time (No mid-level saves).
It's still a well design game, a good game, it's just not a game for me.