(Oops, I accidentally posted this comment to the non-jam page for your game. I guess I should post it here too so it's in the right place, hope you don't mind!)
Wow, that was extremely impressive! The first unexpected happening caught me completely by surprise, and you did an absolutely fantastic job at creating the atmosphere. I adored the environmental lighting (especially when I think some lights seemed to flick on while I was exploring), the ambient audio, and the unsettling ambient musical notes that I think started playing while I was working on a task.
Despite the model geometry being simple (which is of course a good idea), I loved the amount of detail you managed to put into the environment--especially the little touches at the beginning like the tables and chairs, the cash registers, and even the shiny monitor screens. Extremely impressive attention to detail.
I won't spoil any twists here, but I like how the player's speed changed--another nice little touch.
First game jam entry?! Wow. But surely not first game?
Also, I really like the juxtaposition of horror + pizza delivery. Very nice! :)