Awesome game, the atmosphere was on point and the mechanics were simple to pick up! Overall I love the concept!
Some suggestions:
Add a reason for players to fear not feeding the beast, somthing like a timer that ticks down as soon as you feed the beast at the beginning. Optional - increase the timer every time the player feeds the beast or make the timer deplete faster the taller the beast becomes.
Add a photosensitivity/ possible seizure warning to the game the game. The static/ lighting effect toward the end of the game was intense enough to be a problem for some.