A compilation of 26+ mini JS games made by the Codegolf Team between 2013 and 2016
Play here: http://codegolf.github.io/js13kGamePak
Plus a few chip8 ROMs. You can download all the free chip8 ROMs here: http://codegolf.github.io/js13kGamePak/ROM.zip
The source code of the js13k chip8 ROM can be found here: https://github.com/codegolf/js13kGamePak/tree/gh-pages/src/js13k_c8_source.txt