*Novelties*, did you mean?
As well as introducing some of the new guardian variants, I would suggest any Hacklevel13 should also tidy up the game engine where known bugs occur (such as the two bugs that you fixed, following John's advice, in the 30 Years Quiz).
Other things could be added, such as the patch which makes sure that Willy always starts a game facing right (in animation frame 0).
No, I meant "novelty", referring to Hacklevel 13, in singular.
Yes, certainly there seems to be more than enough stuff to warrant introducing a new Hacklevel .
I am not sure if John Elliott has been following this thread and whether or not he would agree, and - more importantly - whether or not he would be willing and able time-wise to do something about it. I wonder if it would be appropriate to ask him directly?