I suggest you to immediately end the try when you hit a blue circle, instead of having the reaction continue, because it's useless and it considerably slows the game.
Why would you even let the chain reaction continue after a blue has been tagged?
It's very, very short but it's also good. Can't say the concept is original, but it works.
I was expecting the game play to be similar to Boomshine. It turned out to be more like Chained Smiley.
The blue circles absolutely drove me crazy. The green circles can be kind of annoying too, since circles generally travel diagonally across the screen from top left to bottom right. Green shots have a harder time intercepting things.