What a delightful little game.
The pixel art is adorable and I love all the little details, from the "objects eaten" counter having the background of some meat on the bone, to the townspeople being food, to the little portrait of Buffet Knight on the wall.
The eating mechanic is really well-executed and very intuitive. As someone else said, having the menu button on the same key as the one for swallowing food results in a few occasions where the menu comes up when you meant to eat something, but it's seldom enough that it was hardly game breaking.
The boss battles really weren't a challenge at all due to the ability to suck in all projectiles. They were all basically just a matter of standing below the point where any of the boss abilities could reach, and holding suck until projectiles came that I could use to damage the boss. The designs were cool, though.
I'm guessing Katamari Damacy was an influence here, especially for the path to the second ending. I honestly thought that one was far more entertaining and absolutely hilarious.
Really well done, Nowis. I'll be very surprised if this one doesn't at least place.