The game was a ton of fun, and I loved the fast-paced gameplay and upgrade mechanics. I can definitely see the potential here for future updates and a finished game.
My only thing is, even though I knew the food was "decaying", the game could've been the exact same without any sort of decay theme. It felt to me like the theme decay wasn't really involved much with the gameplay or game design itself.
Overall, it was a fun experience, great work on this! :)