A web-based user-participatory service for video game creation is constructed. Its programming environment is based on a graphical programming language called Islay and is written in Adobe Flex so that it runs on any Flash-capable web browsers. Users define games in terms of the intuitively comprehensive state transition diagrams. Executable game files are automatically generated in the Flash SWF format. The executable files are published along with all the programming resources including the diagrams so that other users can play, modify and enhance the games. This service works as an open source forum devoted to video game creation for everyone who has a web browser.

User participation, video game, application, service on the web, consumer-generated media