If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
A turtle's shell is a great source of protection. But it also makes a great paddle for a breakout game!
Mouse - Move & Shoot.
To complete a level, clear all the bricks. Bricks with 1 star much be hit 1 time to be broken; bricks with 2 stars need two hits, and so forth. Catch falling power-ups for help. (Hint: You can fire more balls even while some are still in the game!)