When I was a small kid in school, There were classes held at the computer lab. sometimes they made us do some activities involving point-and-click games, about the topic of the day. These games were made on a program called JClic. fast-forward today and I can install JClic from flathub. I've been giggling at the game's SFX for the past hour. This software has been mantained for all these years and I found out it was always open-source.