A simple update for your convenience (as requested many moons ago) this pack now includes both 'subtle transparency' and 'opaque' variants for icon faces. Some folders have been renamed to reflect this change, and this only applies to sprite-sheets - but it should allow you to get the exact look you want for your game!

Also just a quick note to say thanks for your feedback and support on this pack. Watch this space for more updates in the near future! :)