Full brick is pretty rare in cape cod. It would either be a small building, or only brick on the first floor, with clap board for the pitch of the roof and dormers. Full clap board, however, is pretty legitimate for cape cod. Just make sure whichever you use to be diligent with the left-right edge coverings.
We could probably work on some of your proportions, as well. The distance between the furthest windows and the edge of the building is pretty big, which makes the building feel barren and undecorated. If you trim down the size of the building maybe 2 tiles inward on both side, it'd have a big impact. You may wish to make sure that your dormers are all the same sizes, as well.
Cape cod houses normally have shorter, broader windows. Using shuttered windows is also a very good idea when going for the cape code style.
Finally, lowering the pitch of the roof just a little bit, and adding a few embellishments to the porch would really bring it in the right direction.
Working on these points would help make the cape cod style more apparent. I'll be excited to see the next draft!