While the idea of your dead spirits helping you on future attempts is really interesting, I didn't think it was executed that well as they often get in the way, and if you do want to take advantage of them there's a lot of waiting involved. I have bigger gripe with the controls however, since Miko moves instantaneously instead of accelerating/decelerating and at such high speed at that, precise movement feels very difficult, and since she wall-sticks even if you're grounded I also often wall jump when I don't mean to. The combination of using the spacebar and shift key also wasn't comfortable for my hands so although I like challenge I eventually stopped persisting.
I hope this doesn't come across as overly negative, I get it's meant to be a parody of an "unfair" game - honestly the level design was actually pretty neat and didn't feel like it was trolling me that hard - but more underlying issues related to controlling movement made the experience worse for me.