Nothing happens when I press enter :/

Sorry, there's a major bug in that if you click anywhere on the screen the input field loses focus. If this happens before or during the intro screen, there is no way to return focus to the (hidden) input field because the UI screen in on top of it. Probably UI input fields are not the best idea for a main game mechanic (although they do more closely match the UI of the Apple IIc I was 'emulating').