I found the game a bit frustrating to play. It took me more than one attempt to figure out how to solve most of the challenges, and having to restart the not just the level but the whole game every time was annoying, especially if you died just because you didn't know exactly what each button would do. Maybe I'm just bad at video games, some of the people below seemed to have a better time than me, but I found it punishing rather than challenging.
All that said though, I did replay the game and the bits that I could remember how to do were fun to play! Regardless, I really like the concept of the game. Perhaps it would work even better if you could just click the buttons instead of having to shoot them? Certainly a lot of potential for a cool puzzle/reflex game! And of course, the game has a charming visual style and nice music. Good job!