Sadly, I found it excruciatingly difficult to play this game because the enemies were way too hard to get around and if one of them touched you (visible or not) you would have all of your progress completely reset.
If you had another means to defend yourself/ defeat enemies, this might have been a little more playable. Its a real shame too, because I can see that actual effort went into this and I liked the idea behind the two states of visibility. Sadly I just think this game needed more time.