Who doesn't need a little more child sacrifice in their life?
I liked the spookiness, and I thought it was a very interesting mechanic. But it did feel like it was in an early stage of playtesting--my instinct was to highlight all the words and try them all, so I quickly ended up with hundreds of cards. And since a lot of responses contain the word that triggered them, it's easy to go in circles, multiplying the words every time.
My suggestion: Forego the highlighting (it's well implemented, I just don't think this is the right place for that mechanic) and put all the keywords directly into your inventory (you can still have cards that don't get a response--just have it not generate cards for words like "a" and "the".) Then have the card get eaten permanently, whether it gets a response or not. Also, have words you've already tried not get added to your deck again--I had trouble remembering what I words I had and hadn't used.