Omg's score is most likely not possible. As you can see by the comments, the level had multiple versions and thus a better score could've been possible. I messaged omg and he wasn't able to reproduce the 7 moves solution, so I think it can be deleted.
I found the 13 moves solution. It's a very nice one, a very elaborated one, a very "why do things in a simple way whan you can do it in a compicated one?". <3 it.
I messaged omg and he wasn't able to reproduce the 7 moves solution, so I think it can be deleted.