I checked it out. While it has some potential, I ran into some issues running it.
For starters, it ran in a tiny window for me. When I attempted to go full screen, it cut off a quarter of the screen on both the right and left side (I cannot explain why, and there were no settings to change it). It's definitely easier to put in information about spells, monsters and items than it is in BTCS, but once I got onto the map building screen, there was no way to exit it or alter the map in any way that I could find. The documentation is kind of lacking.