This post is from a low-reputation account and contains an unverified outbound link. Be cautious before clicking external links.
This is a source code that allows you to create a website to synthesize online games (HTML 5 games and flash) from various sources so that users can enter and play.
Now you can download source code free here: https://opensourcevn.com/source-code-web-game-html5-flash/
Or Demo: http://game.opensourcevn.com/