Type whatever you like! Arrow keys, Shift, and Enter all work as they should. There are different commands that you can enter on a blank line to change properties: /color, /size, /font, /hide. It was sort of a test to begin, but it was really fun to code, and I think it turned out better than I expected.
This project is my entry in "Scratch's got Talent!" Some of the letters look a little bit weird because I was only using a 3 by 4 pixel grid, but if you have any suggestions for better patterns, please leave them in the comments! The "font" is stored it the 2 drawcode lists, so feel free to change them and see what happens to the letters. The drawcodes lists are filled with a list of numbers symbolizing a series of numbers on a 3 by 4 grid. Then the pen reads this list of points and goes to each point, drawing a line in between each point. I may eventually make a font editor inside it, if you want that, leave a like and a comment telling me to do it! Thanks to @griffpach for the Backspace, Enter, Tab and Escape Key Detector