The previous day I requested a game to be on the speedrun.com leaderboards.It got rejected because of short/trivial.The game is an fps parkour shooting game really close to karlson but it isnt just a copy of it.So the reason MUST be short.But karlson leaderboards have times of 2- minutes and the game is indeed in the leaderboards but mine game isnt.In the game i requested you get an average of 3 minutes but it STILL got rejected.If its an exception for the game karlson,can my game request be an exception too?If not,why not?

Karlson was probably added before they made the rules stricter.

Karlson wasn't added before the rule change, it's just that the first Karlson speedruns were over 5 minutes long and the game received a massive amount of attention, so it's not short, trivial, and it's notable.

Nowadays, the site staff only accept games that are over 5 minutes, or are shorter but very well-known. If your game was 3 minutes long, then thats the reason it got rejected.