It seems that for a while the puzzle slider game Crazy Faces was bound to never see the light of day. That is until a fan managed to find a prototype cartridge and post it on the internet! It was, indeed a fan on the SMS Power forums who dug out this gem, and posted a bunch of screenshots on the site for you to enjoy.
The game itself isn’t that special. It’s just a generic puzzle slider game, with Sonic and other Kremlin (they worked on the Prince of Persia Game Gear port) properties slapped on each puzzle for show. If you are however curious to see what the game is, you can play it here. Either way it’s an odd curiosity worth checking out for it’s rarity. Plus it’s always nice to see these things in the wild. Good work gamers!