I found this free simple block game. It is mapped out, sort of like a skeleton crossword puzzle, with domino blocks (without the spots).
It is called Bloxorz, by Roboman. You play it and save it by Bookmarking /Favorites it. You don't use the Mouse but the arrow buttons. It is on albinoblacksheep(dot)com.
The challenge is to get the two-domino-block down a one square hole. Then it goes up to another level.
I found it on MSN.
