Hi there! I looked into it, but the files for this project are 4 years old and have developed incompatibilities with the engine used to render them. Without recreating them from scratch in a newer version, I can't remove the sun pillars.
Best I can do via image editing is something like this, to minimize the pillars:
And here are the PNGs for this animation so you can try it in-game: https://untiedgames.com/files/heart_spiral_masked.zip
Would this work for you? If so, want me to do the rest of the ones with pillars like this?