You require a tape or disk version of Rainbow Writer to play Heimlich & Co.
If loading Rainbow Writer from tape, insert the tape into your tape recorder and type:
CLOADM "RW42" (ENTER)
Wait for the preloader to display the "Rainbow Writer Loader Menu", then:
Select option 2 (32K)
Select 0 (ENTER) for character offset
You may now insert the Heimlich & Co cassette and load with the following instructions:
CLOAD "" (ENTER)