All my icons have gone!
Fotovado is in full screen mode. Touch and hold the screen to toggle full screen mode on and off.
Unable to enter text or change brush
Check that your iPhone/iPad is not paired with a bluetooth keyboard. When a bluetooth keyboard is active you will not see the onscreen keyboards. See this apple support article for more information :
Where do I enter text?
Add a comic callout or text box, then just double tap it to bring up the edit window.