This series is on one level fantasy horror which doesn't stretch the brain too far. It has enough to keep you interested for the whole series with interesting twists and turns. It is good hocum. There are however too many flaws for it to be great like Stranger Things.
The character of Kinsey is troubled at first by her experiences, but when she undergoes a dramatic character change, becomes just unpleasant. I felt sorry for her nice but dim boyfriend Scot who surprisingly sticks with her.
Bode on the other hand, despite being about 10, has a shockingly poor level of adult supervision. He seems left alone in the house all the time, almost forgotten at times by his siblings and able to go off to town at times on a whim. We don't even learn that he goes to school until fairly late in the series. It is also difficult to believe that he has no friends of his own age.
The Mum has been through a traumatic event and despite all this and her being a recovering alcoholic, has no input from social services at all which seems difficult to believe. Her parenting skills are obviously suspect. I can't understand why she decides to move to key house in the first place when her late husband obviously hated it.
Finally the plot twist at the end was so obviously contrived. It left a lot of plot holes and a fair bit of incredulity on my behalf.
I hope that any second series improves on these factors as the general idea has promise but needs fleshing out better.