public void sequenceEnded(String imageName)
// called by ImagesPlayer when the explosion animation finishes
{
showExplosion = false;
explosionPlayer.restartAt(0); // reset animation for next time
if (numHits >= MAX_HITS) {
gameOver = true;
score = (int) ((System.nanoTime() - gameStartTime) / 1000000000L);
clipsLoader.play("applause", false);
}
} // end of sequenceEnded()
