A few years ago I took a class of middle schoolers through a simple game dev course and rarely have I seen a group of kids so motivated. Using microStudio[1] they built the story, art, music, gameplay, and levels - I only helped a bit with the code. They kept asking about it long afterwards, so I eventually threw it up on a static site: http://uprag.quest (warning - flashy jump scares)

[1] https://microstudio.dev