This was nice! I really liked the character models and the game made me remember of "Night of the Costumers" but much more chill.
The only problems I could find is that the main door is bugged, every time I went trough it, it would spaze out and sometimes fling one of the brooms under the map, perhaps not having a door could make the game smoother with the gameplay also, since you have to go in and out to get new brooms. Also the aisle signs could have the number on all sides, I usually didn't use the middle corridor because there where too many people on it, but this created the problem that I could not identify the correct aisle from a distance.
Also making the game easier and then having an increasing difficulty could perhaps make it more fun on the long run.
But overall, this was a very neat game, with more polish it could be pretty great, congrats!
And my highscore was 5.