Blitz revisited – behind the scenes

My first game on Windows Phone. In its first month it has got over 2500 downloads!!
http://www.windowsphone.com/en-us/store/app/ufoinnewyork/edd035f3-9fc3-456f-94a2-e8501f2cff7d

This is based on an addictive game my sister and I enjoyed playing when we were young.

I cannot believe how fast phones are now. This game redraws the whole screen from blank to skyscrapers in less than a blink of an eye! In the old days, you would draw the screen once, and only make deltas to the screen (ie: draw the skyscrapers one time, and remove blocks each time there was a bomb). When C64 and BBC came along, you could draw a screen in the background and then redirect the video buffer to read that instead. How times change!