#4104: Rum's NES Ninja Gaiden III: The Ancient Ship of Doom in 11:05.92 was rejected since it used an easier game version and the audience preferred the harder one.
You can't skip
anywhere with the bike/surfboard glitch, it either ends the level or rolls through open bus and arrives to the start of the ROM, where game end code is located. If a certain flag is set, it will "beat" the game, otherwise it will execute game over. It's really hard to manipulate what exact code is executed in the glitched state, because it's hard to predict it and there aren't many RAM addresses you can affect in that level. There's no ACE method known, at least yet.
Skipping those 2 levels is subjectively more entertaining too, because they're mostly autoscrollers, and there's not a lot you can do to be creative there after everything we've seen in the current run. It'd be basically the same thing, with little to no complex gameplay to optimize.
So my only complain is the snakes level.