Runfield

Home: https://web.archive.org/web/20151230145617/https://developer.mozilla.org/en-US/demos/detail/runfield/#
State: mature, inactive since 2011
Play: http://fhtr.org/runfield/
Platform: Web
Keyword: arcade, open content, 2D
Code repository: https://github.com/kig/runfield.git
Code language: JavaScript
Code license: GPL-3.0
Assets license: ? (MPL/GPL/LGPL)
Developer: Mozilla, Paul Rouget

Control a fox and try to run as long as you can, jumping over the holes in the field.

Building