How to play? Very simple!
Listen to the sounds, and tap the tone you think is correct, using the 4 buttons at the bottom of the screen. Correct answers get more points (bottom right), and the more you advance, the more points you get per word. Wrong answers take one life (bottom left). The quicker you react, the more points you can also get. A bonus multiplier sits on top of the score, but will decrease each second. If you want to replay a sound, just tap its word, but you will lose the bonus if you do so. You get extra lives after you pass a certain score, just check when you get the next extra life (bottom left). The more you advance, the bigger the words are, having up to 4 components. Keep in mind that those are generated randomly out of all the possible sounds, so they don't need to mean anything.