I'm not honestly sure if this is finished or not yet, but you have a ton of plain sandstone spots on your house with no patterns or windows or anything. If there's not going to be a window, you need to put a log pattern on or something to make it interesting.
There is very little in the way of landscaping, basically just a mailbox and some underwindow flowerboxes.
The shape isn't "bad" per say but it is very symmetrical.
There's a little gap of sand above your open window, use /mc to place the sand without it falling if you want to fix that.
No decorations on the roof, it could use some vines or a weathervane or something of the sort if you wanted to make it more interesting.
Overall, the exterior looks like you're still building it, but the interior looks finished so I'd assume this is finished as well. The exterior of the house is the first thing admins see when judging, so you need to make a good first impression, and right now it just looks bland.
Interior:
Spoiler
The first floor feels too open. You have the kitchen and entryway arched off, but it still seems like it needs to have another divider somewhere, perhaps between the sitting area and dining area. In addition, the floor and celing are very plain, which might have something to do with the feeling of openness, try using more types of wood or carpet to break it up.
I would use a color other than white as the floor of your bathroom, right now it's blending with the toilet and bathtub.
The kitchen is OK, but it could still use some more decorations like a painting on the blank wall or some flower pots in the corner counters or just anything in general on the countertops. You could also use a flooring type other than oak wood to give the feeling of a separate room.
The second floor's space is better managed than the first, I would say, but I'm wondering what the carpeted area is supposed to be. Are they benches? Couches? I would recommend some more defined furniture in this area.
The master bedroom looks a little under-furnished. You could potentially put a desk/study in one area or break it up into a bedroom and small bathroom.
Overall, the interior is a lot like the exterior; it's fundamentally correct but a little boring. I would say your layout is good, and I would recommend focusing on making the spaces look more "lived in". You could look around Ponyville for inspiration, or you could even just look at your own house and draw inspiration from that.
Overall:
Spoiler
The house needs some work to be pass-worthy. The exterior's biggest problem is the lack of detail, and the interior is in need of slightly less work, but it still needs a few improvements to be pass-worthy.