Also, jetpack% where you get the jetpack in the dev area as quickly as possible, or try to get any jetpack as quickly as possible.
First person mode would never happen, because it's a terrible idea. Why? Some people play the game like that normally. That's making people's playstyle affect their runs. Bad ideas... Stop. This game isn't getting a category extension, at least not for at least a few years. stop.
Just did a bit of jumpless, As of 5/11/19, 62 of the 64 ice creams are possible without jumping but one of the impossible ice creams is the final boss. If a jumpless way to beat the last one (The Hecklands Challenge) can be found then 100% No Sun (with/without bonus levels) would be possible jumpless.
Now here's the problems: It can't be done in a single recording, and it requires Hub Duplication. Some require duplicating the hub, others require duplicating the egg hunt/level creator to reach. To change duplications, the game would have to be closed and reopened. The other problem would be when (if) the egg hunt level is removed, which might make some impossible. The other problem with Hub Duplication is that most speedruns ban using Hub Duplication or similar.
38 of the IC (that are humanly possible) are possible without any glitches. Check the category extensions page for more info.