First Haiku

[Magpie]

We stood in the door.
With snow falling, I asked you...
two moonlit smiles.

Hi alatos, this works as a short piece in it's own right in quite an interesting way but as a haiku there are a couple of elements that wouldn't usually be in a haiku. Firstly the tense indicated by 'stood' means that it was in the past whereas haiku are always in the present and very much a snapshot, so the narrower you can make the time frame of all the things happening in the haiku the better. So in your second line when it moves to the ellipsis there is a suggestion of time passing and also time that the reader is not part of, whereas in a haiku as well as aiming for brevity the reader would be aware of the time frame and included in the whole of the the poem.

Although as I said before I do like the effect that you have created here and I get it, but it wouldn't usually be seen as part of a haiku.
Hope this is of some help. Also for your first attempt at a haiku it bodes well if you were to try and write more. And you are in a good place here to be writing them and learning about them as there are some excellent haiku writers here.

Cheers for the read,
Mark