Hi Danil,
The li elements don’t get the scale-box class when you do not set presentAsScale to true in the Question controller (and in my experience, setting it to true prevents keypresses on 1/2/3)
However, they get the normal-answer class, so you could either add the rule font-size: 18pt; to li.normal-answer { in Question.css, or you could add it to .PennController-myController.Question-Question li { in global_z.css
Jeremy