Well in terms of the header art, its kinda weird considering like 3/4's of it is covered by the main window hahaa. I wouldn't be sure what to suggest being put back there. I think the one that's there now is pretty good but I suppose you could experiment with different ones.
The screenshots are pretty good at representing the game as well, although I do question having the one there. I thought that the Baby Monster squeezing Thomas was something that you would want to keep seen to a bare minimum,considering you wanted it to be similar to the deaths in The Last of Us. I'm not being negative about its inclusion, I'm just curious is all hahaa
In regards to the description and bullet points, I think that the description is pretty spot on so you don't really have to change that. Same with the bullet points, although I would add an emphasis on the fact that the game draws on real life experiences. Perhaps have something like this:
"Spine tingling horror heavily inspired by real life struggles with mental illnesses such as OCD and Depression"
Obviously you don't have to take that word for word but I feel like emphasising that makes the game stand out as being unique in the horror genre. I mean heck it's one of the big reasons I backed the game in the first place so hahaa
I'm not sure of any other awards at the moment so I can't really add to the ones you already have there.
Something that would be good though to add closer to release are press quotes. You could add some now if you wanted (From like previews and such) but you'd probably have more to work with and have a more genuine opinion if you left it until review copies are out. In the end though it's up to you!