This game has great atmosphere, and I love the pixel filter you applied to the game. It took me a long time to figure out where the counterspace was for preparing burgers, but once I found it I was able to make my first order.
During the second order, the lights went out. I think it was meant to be scary but I found it aggravating as I could not see what I was doing. I then got stuck in the freezer (not a bug, just couldn't find my way out) and then I gave up at that point.
I think the blackout section could be good if you put a white outline on the ingredients when you mouse over them. That way, the player can still be creeped out but be able to make the order without getting stuck or annoyed.
Otherwise, good first impression!