Digital {l Wrote}:As a completely new user on this forum I have difficulty adding this level.
I was able to add the worldmap of 2016 Level Design Contest but it appears that zip. contains metadata already
Indeed, the Level Design Contest worldmap is packaged as an add-on, as most ready levelsets and worldmaps are.
However, for single levels it's not really useful to package it, it makes a lot more work than people do benefit.
Digital {l Wrote}:Can someone be kind enough to link me to a tutorial on adding levels / worldmaps ? really appreciate it
In this case you can extract the ZIP file and then, try right-clicking on the resulting STL file. You need to "Open with..." SuperTux.
If there is no "SuperTux" in the "Open with..." menu, usually that menu has some "Other" dialogue, where you can still select SuperTux.