Gordon runs his software program by typing in the name plus a ".exe" on the end. Commodore 64 did not have file system extensions like 'exe, txt,' etc. That was only for IBM PC's.
Mutiny was a centralized dial-up service, not a peer-to-peer network (which isn't possible with single-line consumer modems), so Sonaris (written to map the size of Mutiny's network) makes no sense. As a paid subscription service, Mutiny would already know how many users there are, both active and inactive.
Gordon is learning to program using "C" code. He is writing the C code on the Commodore 64 even though he has an Atari ST computer sitting next to it. An Atari ST is about 10x faster and more powerful than a C64. You COULD write C on an Atari ST, but not on C64.
The 1541 disk drive that Gordon puts his SOLARIS disc into it's not turned on. The power light is not lit up.
When Gordon starts his program Sonaris, he types LOAD "SONARIS.EXE". However, the extension for executable on C64 is not .EXE, but .PRG (.EXE is for DOS and Windows). Also, he didn't add ",8" at the end, since that is the proper syntax for loading from the disc, or ",9" as he has two disc units on the table - first would be ID 8 and the other ID 9. Also missing is the proper response from C64, which should write LOADING and afterwards READY., before typing RUN to execute the program. So the proper screen would show:
LOAD "SONARIS.PRG",8
LOADING
READY.