Really nice atmosphere, good thing there's options in main menu. It feels good to be a monster and chase down that helpless human.
Now let's move on to bad things I have to say:
Traps don't always work, Alex didn't spawn once, magic spell is too slow, cooldown for placing traps is not visible, Alex is too hard to catch almost impossible since it takes some time holding RMB to catch him.
Turning of the lights reminds me of Nocturne's "Paranoia" from League of Legends, would be awesome if there was a sound effect and you could see trough darkness.
Anyways great job, you managed to execute the idea in a good way just needs a lot of polish but this is a game jam so there's no time for it in 48 hours.
P.S. I did find that Game Jam logo in there.