It is okay. I like that the rhythm indicates when you will be able to shoot. What I do not like is that the game is far too big. It didn't fit my 1380x1024 resolution which is strange. I was playing on a laptop. The other thing I did not like was that there was no way to free my cursor after playing the game. I wanted to click on a button to rate the game and had to refresh the page.
The game is a bit too easy.