@Kornel, what do you think of my suggestion above of putting Nightmare! saves on the server? That would address your number 3 concern.
That will require substantial rewriting of code. Not sure if this will ever get done given everything else. While there is a "server" now, observe that it is still in its infancy and has more of a "pull" model than a "push" model -- writing
to the server is no where implemented yet.
And you can combine that with other people's suggestions of limiting the number of saves. (Or perhaps only allowing a save after a certain number of levels have gone by? Perhaps you only get the option after a minimum of level 25? Or 50? And then you lose the option until another 50 have gone by?) That might address the number 1 concern.
There
is a limit: zero. Last I checked, zero is a number. But on a more serious note, the merits of this is out of the scope of the thread because it pertains only to Ao100 or ArchAo666. Let's wait till Kornel returns from the Eclipse before we open a new thread to yell about that.
As for number 2... I usually die if I go fast, so I don't know what to do about that. :P
Play fast, but not too fast? I dunno... you're on your own there...