- javascript
1. press s to enter the game interface
2. press 1, 2, 3 to select game level
3. launch the ball with f
4. move paddle by key a and d
5. when game over, press t to continue
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some blocks have multiple lives
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we can drag the ball casually by mouse, so it's easy to test and debug
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we also can change the speed of ball by sliding the range
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moreover, we can pause the game or resume the game by press p in anytime, it's like cheating. hahaha.