Here's the game I think I was thinking of: **Lunar Lockout**

http://www.funagain.com/control/product?product_id=010971&reviews_show_all=Y

![enter image description here][1]

Here's how one of the reviews describes it:

> This is a great little solitaire game. It's quite similar to Ricochet
> Robot in theme, but there are some important differences. There are no
> walls--not even around the edges. You must get your man to the center
> solely by bouncing him off robots. The goal-spot is always the red
> square in the center. Instead of random board and piece placement, you
> must solve puzzles as provided on cards. If you think these
> differences would make it more simple than Ricochet Robot, then you're
> in for a big surprise. The puzzles, especially at the top levels, are
> tear-your-hair-out difficult. Solutions are thankfully provided on the
> backs of the cards, but that's cheating. The components are very high
> quality. The robots all have their own 'look' beyond being different
> colors. The base of the board slides out nicely, has storage space for
> the robots and cards, and snaps together snugly. My only complaint is
> that I'd like to see an expansion set soon with new puzzles to solve.


  [1]: https://i.sstatic.net/j0mHa.jpg