Space Ace is an unreleased video game for the NES (Nintendo Entertainment System). The player controls Ace in an effort to save Kimberly from Borf, and the title was going to be the same kind of slow platforming title with sluggish controls that Dragon’s Lair was adapted into earlier, but it was later cancelled for unknown reasons. Space Ace was later ported to the SNES, albeit completely different. The original was advertised in the December 1991 issue of Italian games magazine Console Mania, and nothing has resurfaced of that version other than a couple screenshots.
http://www.unseen64.net/2008/09/11/space-ace-nes-unreleased/ The game's little history and grammar on Unseen 64.
http://www.lostlevels.org/wordpress/2008/09/06/first-screenshots-nes-port-of-space-ace/ a Lost Levels blog about this game.