Added some FX to add some life to the game

[Poroto-typing - Apr 25] Today it was time to make the game feel a bit more lively with some FX. I added a little explosion animation for the red rivets, accompanied by a popping-sound clip. Also added sound for shooting.

Finally, I re-worked the stage slightly so the balls can roll away once finished (also made them smaller so they would bounce around the red rivets a little better).