You can use it on any modern browser here: https://jkottler.github.io/fbl-roller/
The current interface is not exactly what I was hoping for, but with the game released and the dice already out of stock, I thought the community would be better served by a functional roller now than by a prettier one that came out later.
Feedback, pull requests, etc, are all welcome.
Planned improvements include:
- Better interface for phones and other small devices
- "Dwarf" mode for multiple pushes
- Improved die face appearance