Can I use into my commercial game? I made a game with same styly of you.
http://store.steampowered.com/app/461400/
Viewing post in Pixel Shooter and Towers Asset Pack comments
I noticed you created a game with this asset and submit to greenlight. When you submit a game to greenlight other people cannot use the same asset. Valve delete games with assets. from other games.
Your game link:
http://steamcommunity.com/sharedfiles/filedetails/?id=731848181
Guess someone is using them in that game, but if that's about steam's policies then idk. If they are blocking you it seems like a reasonable anti-theft rule that just unfortunately doesn't account for indie games with freely-released graphics. Maybe someone will be able to sort it out. Don't know much else about it though so good luck.