score
function updateScore(){
currentScore += 5;
score.innerHTML = 'Score: ' + currentScore;
}
function difficulty(){
//as the game progresses, increase magnitude of the vertical speed
if(currentScore % 1000 == 0){
if(dy > 0)
dy += 1;
else
dy -= 1;
}
}
function gameOver(){
//end the game by clearing the timer, modifying the score label
clearTimeout(timer);
score.innerHTML += " Game Over";
score.style.backgroundColor = 'rgb(128,0,0)';
}
</script>