This turned out awesome! I still remember the spinning cube, and the monster now definitely makes for a better antagonist. Are there exactly 100 hearts in the scene? I managed to eke out a win by grabbing exactly 51% of hearts haha!
Also, I'm so glad you added spacebar to invert the y-axis. That's a hallmark of effective playtesting -- meaning you must've playtested with someone that was about as directionally challenged as me!