Nice game! The art was simple, yet effective, and the sounds were also subtle but definitely delivers. The concept itself, was also quite neat. Having the loss of a life be beneficial if the level gets too hard, makes the hearts work as a sort of multipurpose tool, where you'd mostly like to save them but if you can't, then you are forgiven. The difficulty was quite suitable and the content (for a 3-day game) was sufficient. One minor issue I had was the fact that you can't move diagonally. which sometimes made it quite difficult to traverse the area. But other than that, it was very well-made. Good Job!
Edit: Oh and also, the fact that you managed to add an online leaderboard within the time span was impressive!