Aww how cute, brothers working together :--^^^^-------)
hmm not bad I guess.Maybe work on breaking up the interior more? add different rooms with more detail, as for the exterior, you could start by making it more curved.
The wedges that didn't load properly - this is a problem with that brickpack, not the save or your copy of Blockland. Can confirm this because it has happened to all of my old saves that use that brickpack.-snip-