There is a game called Odesk. You need some money to create new match and then just describe starting level in natural language. As game progresses, you will face choices, but only once per day at most. It's pay to win though.
https://www.odesk.com/ is a freelance job board, where a premium account buys you the ability to apply for more jobs at one time. The grandparent comment was being satirical.
I'm not sure what the overhead would be for something like that... When you get to a certain level of complexity, canvas or webgl are usually a better targets.