Here’s quite an extensive collection of “Neo Arcade” games written in Javascript using the Javascript Gamelib. I love any game you can download with a right-click 
Def-Logic VideoGames
Scott Porter made a popular library for creating Javascript Games, called the Javascript Gamelib. It provided relatively simple routines for animation, sprites, collision detection and control. It meant games programmers could concentrate on designing games for websites instead of spending time rewriting the basic building blocks.