Yer not giving us a lot to work with, Miffed Muff. I believe some folks (who weren't paying attention or failed to read the README file) learned that the game was installing to its default location (C:/Games) unless they specifically redirected it. You might want to look at all the comments and see if any of the solutions proffered might be worth saving for a future close encounter of the erroneous kind. -
http://game.giveawayoftheday.com/infinite-jigsaw-puzzle/#comments
http://www.giveawayoftheday.com/forums/topic/2649#post-18112

Do you recall if you tried downloading from the mirror site? Sometimes if one server's down, accessing another goes smoothly. While it is frustrating when a game won't download/install/register/play/play correctly, it rarely turns out to be GAOTD's "fault"... usually ends up being an error made by the member or an incompatibility with the member's PC.

A lot of members were really pleased with the game, including this runesage. Since you missed out, maybe this'll help ease the miff. Lot's of jigsaw puzzles -
http://www.giveawayoftheday.com/forums/topic/2661?replies=11

Hi ,I was a bit miffed when I tried to download Infinite Jigsaw last week. And I just couldn't for sme reason. I have been away for a few days so haven't been able to d anything about this.
I have had no problem with previous games and I have been happily playing yesterdays giveaway game. Did anyone else have this problem?