I have used Kaboom https://kaboomjs.com/ to help a diverse group of kids build a simple 2d game together. It’s a toolkit specifically geared toward 2d platform we type games but it could be adapted to make other 2d games. I liked that it was just JavaScript under the hood so you can introduce many programming language concepts, but the engine makes it easy to get things going with very little code. There are also lots of opportunity to focus on design aspects over pure code.

You can also use it online with Replit https://replit.com/@replit/Kaboom#code/main.ts which lets you get up and running quickly and share your work online easily.

Apparently it is no longer actively maintained by Replit, but I’m guessing it still works fine and there is also a community fork: https://github.com/kaplayjs/kaplay?tab=readme-ov-file