is it possible to make new categorie extensions for example Level 1-10 or 1-5 or 10-20 or something like that?
There's a misc. type full-game category named "Rest Point", it stands for completing 27% (or 45% and so on) of the game, where the rest points during the full game completion are made in the game. I don't see a reason for adding category for levels 1-9 (levels for the first biome) as it is too short. Making categories like "Levels 10-27" for specific biomes might cause issues with millisecond timing, but overall the idea is good, I might add it if you give me some ideas of how it would be organized.
Category extensions leaderboard, in my opinion, isn't required either, as there's not so much ideas you can add to such a game, and the main leaderboard can include them all.
I think for example levels 28-45 category is much more distinct than 45% (as it doesn't include levels that are in levels 1-27), but it would be hard implement it, as the game doesn't show the world times by themselves.
(Also if that was possible the best categories like that IMO would be 1-27, 28-45, 46-63, 64-81 and 82-99)