It is not bad but its too simple. make a shop that you browse everytime you win a level in the shop make upgrades. make a bestiary and in game achievements. + so developer sees.
It needs more features. the game is to quick to complete. make it so you serve people under a time limit .If you complete feeding them you get a bonus along with more people to feed. Then make a menu of upgrades that pops up after a day. Make it so maybe if you make a million dollars or something else to beat the game. Some of the upgrades could be the stores appearance; chairs,tables, etc. + for creator to see.