I played the fixed version, but I had a hard time figuring out the mechanics - I was pressing the number keys that corresponded to the rocket and was proceeding through waves, but it wasn't clear if I was passing or failing?
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The overall game rule is: try to launch as many rockets as possible in each wave according to the rhythm. The color of the countdown indicates whether the timing of your rocket launch is right. The number keys, from smallest to largest, correspond to the rockets from left to right in each wave. Every 5 waves, the game will ask you whether you want to continue playing or to reveal your score. Finally , thank you so much for your playing!