As I said, search is random. And truncated. It might not be random for each search attempt though. I guess they rebuild their tables regularly on a semi random algorithm that tries to give projects their share for the search terms. Something like that was hinted or even explained in some threads. This it not the first thread wondering why stuff does not show up in search ;-)
Also, I did see the game mentionend, in the search https://itch.io/search?q=Cy_Borg+generator , but not in the others.
The dev did misfile the game though. It is in games and not in physical games.
And on top of that, there is a bug in tagging. Underscores do not work.
The tag "cy_borg" translates to "cy-borg". You can only find stuff tagged as cy-borg when tag-searching for cy_borg.