I sort of understood the concept, like you're trying to hold a door open but you also have to make sure time doesn't run out? But I feel like there's a lot of ways the concept could have been conveyed more clearly to the player. Maybe some simple pixel art images to represent people waiting, or some kind of door that's slowly closing?
I also wasn't clear on if you were supposed to hold the button to keep the door open, or click it rapidly? I think this game could be made a lot more compelling with graphics behind it to tell what's going on. I couldn't visualise all the data on screen about people waiting, or how long to the next person, and as a result I had no clue where I should be putting my effort or resources as I played!
I did like the UI though, and the name is great! It sort of reminded me of Keep talking and nobody explodes!