It's funny that the gravitation makes the cutlets fly to the ceiling, but the visitors don't. It's an interesting idea, definitely unique! Good job!
Small suggestions for improvement:
The visitors should have some kind of animation
It's strange that the lower bun needs to be pressed multiple times, and it's unclear why you need to move it from left to right and then press it again on the right. This doesn't happen with the upper bun.
It's definitely worth adding an instruction, as I spent several minutes trying to figure out how to play the game until I accidentally pressed on everything on the screen.
A pause menu would be nice. Waiting for the shift to end is too long