Its actually pretty common, and many people use 'cheats' to access the next level if they cant get there alone, or even to add extra facets to the games that they cant reach without the hidden codes. Its all part of the gaming culture, and nothing to be concerned about in my opinion. It just means your kid is particularly keen, thats all. It doesnt imply that your kid is some kind of lowlife cheat.. its just a further facet to the games rather than cheating. I wouldnt worry too much about it personally !
Mitz from Tips4pc