Did you try increasing the font size a bit? On a retina macbook (so effectively ~2x bigger font) I get:
Excited about this... but the OCR quality seems to be very bad. Maybe it's not optimized for recognizing black text on a white background.
For example, I took a screenshot of this comment and ran it through the demo and got this:
Excited about this... but the OCR quality seems to be very bad. Maybe it's not optimized for recognizing black text on a white background. For example, I took a screenshot of this comment and ran it through the demo and got this: