I liked it. I came in with low expectations and you blew me away. The 3 click system was really neat and the cascading effect being good or bad at the first had on the others was really interesting. I liked discovering that quite a bit. Controls were easy to understand and the art felt very consistent. Great job adding in a story of sorts and tutorial as well. Really impressed.
Did you make this in a custom engine? I ask becuase I saw openAL which we use as well for our custom engine.
This is quite a great concept for a minigame within a game or even a starting point for something larger. I did find it a little too hard beat for me at this time but I may be just slow with reflexis. Would have loved if the enemies had Health bars and if your missed shots still shot something.
Good job. Keep up the good work.