Figured I'd give it a try. Besides the occasional "holy shit why I can't map out which way I should do this" and "holy shit do I have nerve damage in my arms that make me unable to do proper eye-hand coordination", I did enjoy it. The last level was very arduous, but slowly figuring out what to do did feel rewarding at the end.
I guess the demon girls looked nice, too. Could've done with some actual puzzle advice from 'em besides couple of levels, though.