By my initiative I suggested that we start a mini-project - a simple 2D minigame implemented in HTML5 and JavaScript. My employer was kind enough to approve of this project. The main goal was to get familiar with mentioned technologies and test their use. HTML5 has advantages over flash because it's platform independent, thus it runs on mobile platforms with much less problems.
Anyway, I have completed the developer prototype and you can
try it out. The graphics are pure placeholder level, so don't expect something fancy. I made all these by my humble skills in Painbrush and Gimp.
Fun fact: when I wanted to rebalance color combination of a picture (I needed to change green part of the picture to red) I seriously considered to write my own custom program for the transformation, because it would be easier than finding the functionality in Gimp. Fortunately, I was able to find the necessary functionality in Gimp :)