It's cool that the layout is randomised every playthrough, but I found no reason for the characters to ever split up, meaning I grouped them together, then just moved them at the same time (W and up, D and right etc.). Sure that's one way to "link" them, but I don't think that was intended.
The atmosphere of the game felt nice. The darkness, ever-looming monster, and uncertainty of if you're heading towards a dead end made it very tense.