Does Microsoft have all files i have?

Idk if this is the right place to ask this, but here i go.

i have windows 10 32 bit. offline account. i am working On a video game. i am Wondering if Microsoft can take it if they want, i dont want it to be Leeked To anyone before it is finished.  If they can, how do i prevent this?  Or can intel take it! I am worried about them taking it.