I have seen this processing game on the internet but cannot remember the site.

I have done a small drawing to indicate what it looks like


Basically its a shooter and you play against the computer. Initially you have a force-field, but it depletes after successive hits. Each player can hide behind swing-able barriers. These barriers can also be hit by bullets to swivel.

If anyone can remember the name of the site. They can post the site, or if they know the person who wrote it, their website or blog.  

Thanks Cedric
Update
I remember what the interface looked like


The site has a number of Processing sketches
Here are a few I remember

Using mouse movements to act as gestures
Using a square and two diagonal lines to form any letter in the alphabet
Physics

I don't know if this helps jog anyone's memory.