Gravity handheld

Back when I was a wee lad, one time when I was helping remodel a building for our family business, part of our 'paycheck' was something we could pick up from Menard's. (Coincidentally the place we got all out building mats from...) I got one of these and still have it to this day, including my handmade high score sheet. These seem to be pretty rare. Does anyone else here have one?

Oh, and...

FIRST!

Never heard of it. Any pictures?

Found some here:
http://www.handheldmuseum.com/Mattel/Gravity.htm

and here:

http://www.handheldmuseum.com/Mattel/Gravity.htm

Cool, thanks for finding that.

Interesting. Reminds me a little of Blip.