Update to ver 1.2

1. Added Light Weight(DX9) version which is even less demanding on PC's performance. 2. Fix a bug that causes two balls to come out in plunger lane simultaneously. 3. Adjusted collision detection. 4. Fix a bug on kick back that causes kick back to kick twice even when it is not Next Double. 5. Fix a bug that causes the gameplay to stop when a ball goes down a drain after a pause. 6. Removed an effect to turn off the light on GAMEOVER. 7. Added some sound effects.