Yup, this is a brand new Goonies game, called The Goonies 'R' Good Enough. There's a catch, though; you can only play it if you're in possession of a working MSX.
It's not some mod or act of sprite robbery; the game's creator Kralizec has been working on it for four years, and it's an all-new title, built from the ground up to celebrate the 25th anniversary of the film.
It's $US45, which is steep, but you're paying for labour and love on this one, not production values or online co-op.
If by some chance you do have an MSX, or just like the looks of the packaging, you can get the game here. http://www.msxcartridgeshop.com/