One story says that, on that day, the disembodied spirits of all those who had died throughout the preceding year would come back in search of living bodies to possess for the next year. It was believed to be their only hope for the afterlife. Version 5.07 includes unspecified updates.
"Cool Graphics, Annoying Ad Banner"
The graphics are realistic with additional cartoony ghosts and skeleton arms coming out of the graves. There is really good lightning flashes and good looking bare trees in the background. Small boos and cackling laughter round out the screen saver.
After about one minute, an ad appears to sign up for other games and offers. They don't disappear until an "x" is clicked on to make the ad disappear. It'd be great if it eventually went away but it doesn't.
The graphics and audio are well-presented and has an overall spooky and cool effect. The con is the dang ad that won't go away until it has been manually "x" 'd out and, even then, it will eventually reappear.
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Note: The review & comment are referred from CNet