Charlie Kulas (who programmed the 8-bit version of Up'n Down and Musical Pilot) sent me some disks, which I was able to read. In our interview, Charlie mentioned Leafer Madness, a game that he started to write. It was demo'd at some publisher's booth at CES, and received a couple hundred orders, but the publisher vanished before Charlie finished the game.
Well, thanks to him, we now have a playable demo (with music!), and the complete assembly source code. Check it out. Or, someone could dive in and make it a complete game.
I also found some concept graphics for Number Castle, a proposed educational game. Charlie doesn't think he did any code for this one.
The ATR-format disk images are attached.
Leafer Madness Ramdisk DEMO 1984-07-31.atr
Boot with BASIC disabled, it shows a title screen with bouncing letters. Press START. Joystick to control caterpillar. Move the caterpillar around, avoid spiders.
Leafer Madness Scroll Demo side A.atr
boots to OS/A+. Many files to explore. According to label, type SCROLL.OBJ then RUN 3100 but that crashes for me.
Leafer Madness Scroll Demo side B.atr
boots to OS/A+. Many files to explore.
Number Castle Picture.atr
boots to Koala Micro Illustrator. Several pix on the disk, including Leafer Madness background and Number Castle concept graphics.
Leafer Madness Dev Backup #1 1983-12-23.atr
Leafer Madness Dev Backup #2 1983-12-23.atr
Leafer Madness Dev Backup #3 1983-12-23.atr
Many files across these three disks, seems to be Mac 65 source code for Leafer Madness.
UPNDOWN unprotected 1984-09-28.atr
seems similar to commercial release. Bad sectors 181-198. Didn't worry about them because UPNDOWN is already preserved.
Musical Pilot ver 1.6.atr
seems similar to APX release
Dig in and post what you discover!