+1 here. I've been facilitating a video game maker club for kids aged 11-15. I have ~7 kids who come. Most kids are 11-13 but 2 are 15.

Since they're all new to programming in general the club has mostly been me teaching them. The kids are having a ton of fun. It's slow moving. But they love it.

They also have the GUI scripting instead of the javascript. I haven't actually tried it.

This is what I used when I was 11. Been 15 years since I last used it, so no idea how much it's changed. The thing that was nice about Game Maker for young me, was that it had a drag and drop and programming language interface and you could switch between the two pretty seamlessly. This really helped me learn how to code early on.

Like other commenters I used Game Maker 20 or so years ago and not only made games but also programmed little utilities to solve problems at my Dad’s work. It was a phenomenal blank canvas for creating games and programs and learning to program (because there’s both Scratch-style drag and drop programming, and a programming language).

+1 for GameMaker, though I used it about 20 years ago as a kid. I don't know how well its developed since then.