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EN: Magical green ball choose-level version, levels are open. The blue and yellow ball strike will become a green ball. But don't let the green ball strike yellow ball, it will become black and then you failed. A very interesting physical game, come to experience it! ZH: 游戏里把蓝球和黄球碰到一起会变成绿球。但不要让绿球碰到篮球或黄球，否则变成黑球，那就失败了。 一款很有意思的物理小游戏，大家快来体验一下吧！