What an amazing and polished game! The comparisons to "Operation" are obvious, but this game made me quite nostalgic for another weirdly specific reason. (Don't worry, I've never done living meatball surgery in real life)
"NintendoLand" for the Wii U had a great minigame called "Yoshi's Fruit Cart" where you had to memorize the locations of fruit on the screen. The fruit would disappear, and you had to trace your path with the gamepad to pick up all the fruit without hitting bombs/obstacles along the way. Your game is sort of like a more fleshed out (pun hehe) version of that, and the similarities brought me right back to one of my favorite games from my teenage years.
TLDR: Meatballs gave me the warm fuzzies. Fantastic job! :)