Really impeccable quality, nice work! I guess "it forbids commercial uses of the work" means you can't use these in commercialized games? Quite a shame, since there's a real lack of HQ pixel-art social icons out there :P
I would love for people to use them in games: But I had to choose that licensing because app icons are in a bit of a gray legal area. They are based on copyrighted company logos, after all.
And thanks for the compliments! I'm glad that you liked the assets 😄