Hmm, I'm having issues with it on a mobile device (Android + Firefox). It looks like there's a hidden text box that I can select in order to bring up the keybo

Hmm, I'm having issues with it on a mobile device (Android + Firefox). It looks like there's a hidden text box that I can select in order to bring up the keyboard, but typing letters has no effect. Hitting return does display a new prompt line, but doesn't have any other effect, even if one of the listed commands had been entered.