Perfect Pangram Perfect Square

Type each letter once. Controls Arrow keys to move X to type a letter Z to undo R to reset This game follows through on a proper puzzle idea based on A Bad Typing Interface. Confused? This was made as inscrutable trash to be sifted and ciphered through, but if you really want to be directly informed about whats going on here, and explanation is provided below, encoded with ROT13: Rnpu yrggre vf n svir-ol-svir fcevgr, naq gurl ner nyy neenatrq va n svir-ol-svir tevq. Gur vavgvny tevq vf zvffvat g...