Meet Archie Ventrox! Use the up, down, left and right arrows to move the red half of the heart, and use the 'w', 'a', 's' and 'd' keys to move the blue half of the heart. (Pro tip: the red half of your heart must go through red balls and the blue half of your heart must go through blue balls. Avoid all white ones!)
I am thanking my cousin for her amazing support. She played this game every time I added to it. :D