If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
There's a talent scouting going on, and lots of bands are participating. Your band's competing, too, and there's a big chance that your talent will be noticed. Therefore it's important that you play the songs in the right tempo, and that you hit the right notes. Do so by pressing the arrow key that appears inside the square frame. The further you get in the game, the faster the arrows will appear. So it takes good reactions to finish this game successfully!
Press the right arrow at the right moment. Press the spacebar to collect the bonus points from the golden disc.