Phineas and Ferb Ride Again has a All Levels NG+ category, so I think the original game should have it too. The games are very similar, so the methods of start and stop (completing a run) would be exactly the same:

Run through the worlds as fast as you can, touch the flying platform, back to backyard, enter next world, repeat.

Timer stops when you touch world 4-4 platform.

Just a thought I had. Both All Level categories in both games are exactly the same, so I think theres no reason why we shouldn't have one on the first game as well.

I'm not sure how All Levels NG+ in ride again works, but i think that the levels are structured differently in paf1 so that it would not work as well. Nevertheless, if you do a run and propose a fair ruleset, we could probably work something out

Alright, sounds good. Basically the same rules as in Ride Again, because both games have a flying platform that takes you back to the first level of a world.

If I record a run of it and lay down some basic rules, you said you can try to figure something out?

yeah, we can probably add it. if you join the phineas and ferb discord, we can talk about it with more ease than through the src forum