The heart rune is currently ugly because it doesn't have enough resolution. The edges of the polygon are clearly visible. Example: https://share.sourceacademy.org/7gbki <img width="712" alt="Screen Shot 2023-01-30 at 10 45 11 AM" src="https://user-images.githubusercontent.com/30220768/215377090-0b26ecb5-207b-4530-90a3-21f3f95025e9.png"> Compare with the ribbon, which has sufficient resolution.