Personally I think they would be, but you might benefit from at least one fully finished drawing that's not part of a composite and not just a sketch/pencil drawing.
I know I'm not official ArtSpots staff but I used to work over at Yerf and we had pretty high standards and to my knowledge, a similar system.
I think you have a good range! Just, yanno, a lot of those images you have in the composite could be "stand-alone". :)