Released in 1988 Gold Cliff was one of the last and thus more advanced Game & Watch handhelds Nintendo released. It even sported a continue feature and I'm pretty sure this was the first time a G&W console managed to pull off such an arcade-inspired trick. The game itself is a pretty simple platform-vanishing, dual-screen, treasure-collecting affair that is definitely enjoyable and quite elaborate for a G&W offering too.
What's more Gold Cliff is quite a rarity in our day and time and you can grab one via this Gold Cliff eBay auction. The console is (obviously) complete in its shrink-wrapped box and will definitely not come in cheap. Seller ships worldwide.