Just as a formality I do notice that you are using other peoples artwork in some of your interfaces. Users such as Tearless and Twee's artwork have been featured in some of the interfaces and just keep in mind that as tho they were probably generous gift to the person, some users would probably like to be asked before you use there material. Just saying this cause I do know people who go mad when people use there stuff without permission if you yourself didn't make the artwork.
Again this such a interesting and lovely thing you are doing, just precautions.
