when i try to open the game via steam it tells me that there is a missing exe file, but i can open through the folder.

i opened the door and go down the big hole but i can't move my camera only can move character and can't do nothing

After the opening CG look, after the explosion of white light, I fell into a black screen, the bottom right corner of the screen did not load, I waited for about three minutes, unable to enter the game.