It's desktop first right now. I haven't put much thought into mobile yet! As for horizontal scrolling, it works great with a laptop that has a gesture for horizontal scrolling. Some mice also have second scroll wheels that can be used for horizontal scrolling. In general, you can also hold shift while you scroll with the wheel and it will scroll horizontally. Eventually I would like to add customizable keyboard shortcuts to this app! It would be nice to navigate the whole thing with a keyboard.

And thank you for the thanks! :)