Have You tried new version of smbx 2? What Do You think about new official episodes, game performance and new features? Should I add new episodes to the categories to bring some attention? I played yesterday for few minutes an episode with SMW worldmap and looked very cool.

it's in beta so it shouldnt be counted for speedrunning stuff in my opinion. when it does come out it will be very cool though, a lot of new possibility

SMBX 2 is made up of two parts: the new characters, enemies, blocks, and other content, and LunaLua.

LunaLua is a hack of the SMBX engine which does numberous things, among them that could affect a speedrun are facts such as using OpenGL instead of DirectX, fixing crashes like when a mushroom falls into lava, and various other Quality of Life improvements. It also adds scripting capabilities to SMBX, which is what all the SMBX2 content is made from.

If speedruns are allowed to be made with SMBX2 (and I feel they should, given the benefits it offers, and due to the fact that SMBX2 will not officially release for several years at this point) then the version number for LunaLua should be noted as well as the beta number. Someone could be using Beta 3 but they updated their LunaLua, and the run might work slightly different as a result.