Worked for me
I came i saw i was interested. The paddle showed up on my screen and everything seemed to work as coded. I use internet explorer so maybe the others are having trouble from them using newer/different browsers. As for the actual game, i like that it makes soundfx when you bounce a block and catching them twice give bonuse points. Suggestions for updates would be make a block bounce until it actually falls instead of just bouncing once, that way you could juggle lots for combos. Also you could add more visuals to make it artsy to go along with the sounds you have put in so far. (Maybe a piano background and you are bouncing notes to make a song?, get creative with it :D)
As you said it is too easy to score, this could be solved by making it so if you hit a black block its game over and your score resets to zero making a survival kinda game, people like those on newgrounds. Also you could set waves so that at higher scores the game gets more difficult somehow.
Anyway dont want to tell you how to make your game but hopefully i gave some helpfull advice, good luck and happy coding :D