You can now download shareware versions for the Commodore PET, Commodore 128,  and the Commander X16.  These versions include 2 complete levels.  The only features removed from the game is SNES controller support, and the cheat-code.   A PDF manual is included in the ZIP file.  You can download them here:

If you’d like to buy the complete version of the game, you can find them here:

PETSCII Robots for Commodore 64, VIC-20 and PET.

PETSCII Robots for Atari

PETSCII Robots for Commodore Plus/4

PETSCII Robots for Apple ][

PETSCII Robots for Commodore 128

I hope to release additional shareware versions in the future.