I saw the posters at my kids school and I am was unconvinced this is a good idea.
Programming / coding is a lot of things, and it's different to a lot of people. But the idea of teaching it by discussing game design really strikes me as a bad idea, for a lot of reasons:
1. Game design is inherently difficult. I mean, it's an art and science, and it is multi-discipline. After an hour, or ten hours, or whatever, you aren't going to have a lot to show for your efforts. Games designed and built by large teams of skilled programmers often fail to complete. Even a simple game requires substantial
2. Most programmers are not going to be doing game development. Or even game development. It's like trying to educate you on medicine by bringing in a surgeon to talk about remote micro-surgery. Sure, you could be the 1/100th of all doctors who are involved in that field. But chances are if you become a doctor it will be a GP.
3. The goal of getting more kids into programming, I would imagine, is to get kids to become programmers to do useful things. Games are a nice slice of entertainment, but in the big picture, except for the individuals, no one is really better off because of a new game being developed. If we as a country/specifies/whatever want more programmers, it should be to be more productive, to have a better economy, etc. We don't want/need more programmers for the next Candy Crush. That's a side benefit. Not a purpose.