Really good game. The sounds and visual effects created a great atmosphere in both the research phase and escape phase.
I liked that the camera served multiple purposes and how your partner reacts to some photos. The phone was usefull all around, but I think that in the escape phase it could have been used more to create suspance, like when it was used to open doors.
The levels structure can be a bit disorienting, but making a mental map of the place knowing that I would have to run through it later was something I liked. I felt it is a difficulty that the player is forced to engage with rather than an annoyance. In some places a more varied tileset could be used to make this task easier.
My only issue was that I instinctively pressed esc while trying to close the phone on the third level and accidentally closed the game. Maybe this can fixed with a pause menu, saving system or more quickly with having to hold esc to close.