Yes, founder here. Bi-directional linking will be coming soon! While we don't support bi-directional linking yet, we do have the ability for bytes to live in multiple locations. Here's a short video: https://www.youtube.com/watch?v=1afP_gsvR30
Please add math support, too! KaTeX is a great drop-in option! If you do, please consider "first-class" math support, like the screencaps here [1]. Both block and inline math are important, and it's important to be able to quickly add/edit math nodes. Another good option is to show the math source $\int_a^b f(x) dx$ while editing, and render it after the user commits a cell, much like Jupyter notebooks.