Use arrow keys to navigate, press any letter keys to type. No numbers, 2 is "!" and 1 is "." and to erase a word, press 7 to show the white-out tool, and to hide it if you accidentally pressed it, press 6 (a lil buggy though) and press 3 to change the paper type. To manually return, press 0 (Zero).
This is a bare basic typewriter program, no backspace, and no capital letters. (Because scratch does not allow it for some reason) press the green flag to reset everything. Max is 22 characters per line. have fun!