The Heart Tile Path is a small world with relaxing music and red and blue floor tiles. These red and blue tiles travel in a spiral path, making designs of DNA's and a Heart along the way. The world does not house any effects.
You go through the Nexus first. Then you go to the Neon World by going right in the Nexus. Travel downwards while pressing the left and right arrows alternatively (southwest), and you should find what looks like two strange red bubbling things close together where you can go through them. You should teleport to the Red and Blue World.
(See the image for the example of the red bubbling thing you need to find!)
- This area most likely is a reference to Yume Nikki's Neon Tile Path, as it has a similar aesthetic, similar mechanics (when stepped on, red tiles make different sounds than blue tiles, just as pink tiles make different sounds than purple tiles in Yume Nikki), and both are accessed from the Neon World.
- It's almost certain this area represents the heart and can be even further proven by the next area having heartbeats everywhere.