First UE4 game i've seen here. Graphics pretty good as expected and I like the idea to have a shooter underwater. Also, I got some good scares. Well done.
You unfortunately seem to have the same problem as I have: The game file is too big and people dont want to download it. So I hope you get your 20 rates at the end of the 2 week period!
PS: I'd be happy if you tested my game too :)