The end sequence can be found in the .prg folder in the download bundle. Select FILE and then choose Autostart disk/tape image in VICE. Now point it to Organism end file in the .prg folder and the end sequence will load and run, prompting you to enter the code you received at the end of the game.
Hi Steve. The disk version will automatically load and run the end sequence when you complete the game. For the tape version it needs to be loaded separately. I just noticed the end sequence tape file was missing from the download bundle so I have updated the download with the missing file. If you download the bundle again you will find the file in the tape folder.