I honestly wish I could have rated this higher, but there are random sounds throughout the game that get extremely annoying. A mute button would have been very very nice. Also, this game is far too simple and short. It has great potential, though. I would suggest adding other surgeries to extend the game. If it wasn't just a single heart transplant, it would be a lot more fun. Additionally, I felt that I didn't have any pressure or motivation to perform the surgery. Adding a timer would make the game a lot more interesting. If you were to extend this game and use this as a tutorial level/surgery, then not having a timer for this first instance would be fine. If you can't think of a reason behind a timer, just use the excuse that the patient will bleed out. Again, I feel that this game has great potential, but I feel that it would make a better tutorial level.