You can enter new text for the message on the Settings screen. Alternatively, you can pass text to this page via the URL — handy for linking to personalised messages. See below for notes about this and more. Unfortunately, this version for Mobile Safari has a few issues (also below). I hope to address them in an update.
There are options for size (height) of the message, the scrolling speed, the direction and the font used. The message can appear as white text on a black background, or black text on a white background. There are buttons to restart the scrolling, and to pause or resume the scrolling. You can also click on the message to stop/restart.
text:The content of the message. Special characters can be URL-encoded if necessary
size:The size or height of the message, in pixels.
speed:The scrolling speed for the message.
direction:The scrolling direction for the message.
font:The font/typeface for the message.
invert:Flag to swap colours, i.e. use white writing on black background.