To be honest I do not like "shape" of that ball, missing old WADF ball, is it possible to use just different picture of ball ?Yes, you can use custom graphics as well as custom movement parameters, all that can be controlled from a level script or a global user script. It is also possible to use animated ball in your level. Give me the graphics you want to use and I'll make a script. IMO, WaDF ball would be too big for KS. In any case it would feel different from WaDF due to differences in movement mechanics.
Cool, congratulations! :) I'm glad you did most of the challenges and found all secrets in Advanced mode. Do you think Very Hard is the right label for Advanced mode difficulty? I was thinking about changing it to Hard, but I guess I'll leave it at Very Hard.
As I understand it, the level is somewhat fragmentary, lacking some middle ground between two modes. The secrets are fine it seems.Spoiler: (click to show/hide)Spoiler: about Basic mode (click to show/hide)