I didn't really understand how to actually play the game. At first I thought I had to serve the clients, then It seemed I had to decorate the restaurant, then it became a weird tower defence where you cannot see what is taking damage from the enemies and neither your "towers" (traps). I took a lot of damage but still didn't die.
The game says that decorations become traps during the day but, during daytime, the traps I placed disappeared and enemies just went directly to the front desk to damage an invisible screaming guy.
Suffice to say I think the game is confusing right now and would bennefit from some tutorial or initial guiding level.