I am currently looking to do some HTML5 game commissions. Games will include a send score function, but will need some work to work on your site, I can do the .php for it if you would like, or I can just tell you what needs to be done for the game to function and your programmer can do it. I have a few game examples that I have done below.
Games I have done for BooPets.
http://fastballfs.com/portfolio/roll_the_bones/ (Revamp of one of their game, all logic is done server side. Presentation is done through HTML5)
Games I have auctioned on VPL, both are property of Earth
I currently charge around $20-30 for simple games like these. The price will really depend on the game you would like, and I can give you a quote once you describe the game to me. I currently do not work with sound, as it is a pain to work with in its current state in HTML5. Also you will need to provide your own art for the games. If you do not have the art available at the time of commissioning me I will just use placeholder art, until the real art is available.
If you would like to commission me please PM me with a detailed description of the game you would like. If you have any questions please feel free to either PM me or post here.