public override void update()
{
// update distance
accumulatedDistance += GameWorld.Speed;
float heroOffset = hero.getPosition().CenterX - startPoint.X;
float dyepackBonus = 50f * hero.dyepacksCollected();
float powerupBonus = 50f * hero.powerupsCollected();
float score = ((accumulatedDistance + heroOffset) / factor) + dyepackBonus + powerupBonus;
// update textbox
scoreBox.Label = (score).ToString("00000000.0");
}