In my research on LEGO Kidpad I ran into this unreleased game: http://chrisschmidtdesign.com/toys/LEGO/LEGO_01.html
And here is some info about the game from the site (http://chrisschmidtdesign.com/background/background_01.html ) I found the image on:
This looks cooler than LEGO Kidpad as it uses system elements (Though sadly Jack Stone type figures) Also I've emailed the guy whos site it was on.
EDIT: Here is his reply