Letter 'N' and 'R' change color, letter 'A' switches the background, the letter 'T' rotates by 90 degrees, letter 'U' does nothing more than just make a click effect (-_-), and letter 'E' makes 'U' make another click effect for some reason (-_- again).
Nothing -w- except Thanks to @Scratch Team for the idea of the last backdrop (which i actually made myself)