Those icons are poor regarding color variation, shading, definition.
They look more like some tiles and not like icons.
"The submitted icons have to be at least 50% freehand work.
Filter works, recolors and copy-pasting are not considered freehand content. Drawing a complete artwork and then copying/rotating it around multiple times in a single icon is not considered freehand work.
All icons must include at least one invisible light source for highlights and a set of shadows to follow it.
Applying outlines over existing artwork layers; applying existing artwork over the complete icon and using filter effects and layer settings to enhance the icon's details, light sources or shadows; and drawing/coloring over existing artwork and using filters and layer settings to change the appearance of the former to make it look drawn - is not allowed.
All Icons must bear a fitting title."
All ur icons seems to be like filter-fests, and not freehand.