My smartphone display is at 30% brightness, but the Info button is visible on the top-right corner as a dull gray button. But it just shows credits screen, instead of what's the purpose of the site and how to use it.

But the big blinking green cursor on the top-left corner gave me the visual clue: If we type any text, the next screen then shows various ASCII renditions of that text.

That's it, it seems -- it's a simple ASCII generator tool.

However, I noticed there's no feature to scroll through the generated text, although landscape mode on smartphone makes it easier to read the big ASCII text.

ASCII fans can manually copy-paste the generated ASCII text for use elsewhere.