...but I'm not going to do it.
Sciere: "The approvers seem to lean towards a new game entry, because the license was lost or altered".
Terok Nor: "C64 and C16 need to go into one. DOS also needs its own entry apparently, because it's a shareware clone called "Pango"".
grabit: "The story about [C64] Pengo and Petch is simple: during beta testing, some of the testers distributed copies of Pengo so we decided to change the name in Petch. So Pengo lived only has pirate copies." http://www.lemon64.com/?game_id=1913
I just submitted an entry for Pango to split the DOS platform away from this entry.
It's in the escalated PC queue. There are a couple of other games there that require admin attention.