I'm not free the coming weekend.
Regarding glitches, I'm fine with whatever rules; even anything goes is fine with me (I barely know any glitches anyway).
If you want glitchless, I think most cases are pretty clear-cut, but there's always little corner cases. Same in Lemmings. What is common sense? I remember long time ago it wasn't clear whether turning a digger with a blocker is a glitch or trick. What is "against the spirit" of the game? Are backroutes in Lemmings against the spirit?
That said, I don't really care, I'm not that good anyway. If everyone goes by their own common sense then things probably mostly align and anyone who's not super competitive will be fine (anyone who is considering using anything in particular unsure about could just ask what people think). There's also useless minor glitches one might trigger by accident (e.g. sprite glitches like jumping up next to a button somewhere in Labyrinth zone makes you jump in the walking sprite), I'm sure you don't want to disqualify people for that. So yeah, I'm not too serious about having clear rules here as I don't really care about the results that much.
Either way, if we start with Sonic 1 Simon posted the rules for the glitchless category.
So these could just serve as our rules, if we need that. Maybe you also want to take out going over the top of the level in Spring Yard?