If anybody is interested in different types of categories or whatever for this, hit me up. I was under the impression that the full game here isn't really speedrunnable due to absolutely massive length but I could be wrong :)
So, quick note about the 0-99 category, the rules for MS-DOS (And I presume Amiga, but can't be 100% sure) should be slightly different. In DOS, you're looking for "Well Done Eternal", NOT "Well Done Immortal".
Why? In the DOS version, your title changes every 50 levels, not every 100--Eternal is the third title after Mortal and Immortal. This is because the base game and the expansion are effectively two separate roughly 500-level games that both use the same passwords, and you're exclusively playing either the base game or the expansion in a given session. In the SNES version, the expansion levels are "interspersed" throughout the base levels, turning it into one 989 level game (I'm actually curious what the one level missing from the SNES version is--I'm guessing the expansion version of Genesis).
Alternately I guess you could make a "0-49" category for the DOS/Amiga versions, but I imagine the goal as Feasel imagined it for the SNES version was "Get to Level 100", not "Get a new title".
Hey, requesting addition for SMS platform to page :) The SMS version is a bit different without speed hacks etc, and far more limited level jumps, but I'm making a spreadsheet detailing each world's info and have a decent first Win run up. Immortal is granted at 100 and further titles extend to level 450. The game itself cannot be finished cf https://www.smspower.org/forums/11633-AboutPopulous but I have found a useful swamp glitch that tricks evil into drowning himself so runs to 100 should be suitable.
Just submit it with the comment of adding the new platform. That is the preferred way I think.