I am no expert at this, but I think I see some Buff Orps in there (the really fluffy yellow ones) and since the photo is with a phone and not a camera as you pointed out, it does make it more difficult to tell the breeds, but they are ADORABLE!!!
If I was in your shoes, I would wait until they are about 5 weeks old to decide on who to keep that way you will have a better idea of what breeds you did get!