so, he did pretty well up until level 7, but then it starts to get a bit too hard. I wish they had an easier version for kids. It's okay though, if I sit with him we can figure it out together, but I now agree it's slightly too difficult.
If you want a puzzle game that is great for kids, I recommend ThinkRolls by Avokiddo. But all these computer games end up crowding out other stuff that I'd rather they spend their time on, and it always spirals out of control unfortunately.