Hi, I just made a package of icons to improve skill level selection menu as well as completed level icon.
It includes:
/menu/art/
level_complete1.tga
level_complete2.tga
level_complete3.tga
level_complete4.tga
level_complete5.tga
Thumbnails of actual files:

This is how it looks like in the game menu:


Edit: Seems like it's redundant...