Apparently Hanzawa also released a Walkie Game series of games. These games (I'm guessing they mean the are shaped like Walkie Talkies) are flat, run on AA batteries (keeps them smaller), and even came with carrying straps so you could sling the game over your shoulder. I've only recently seen these games, and so far I've seen Cosmic Twinvader and Pack'n Maze released by Actronics, and Grand Prix Turbo released by Ludotronic. It's possible that the much more rare games Dig N Picman and Wanted G-Man were released in this style, but I haven't seen them yet. This game is identical in game play to all the other Grand Prix/Racer type clones in the Hanzawa/Actronics line.
Do I have this? Yes, loose.