It's a great idea but I can't use it as is right now. If you add these features, it will become a lot more usable:
- Adjust font size. Some fonts are too small for this app. Some are too big. Letting us choose how it fits the space would be very useful
- Turn anti-aliasing on and off
- Threshold: change the black and white level to shape the font. This would help a lot to make fonts that look too blurry or small workable