I enjoy this game. I love the theme, and I also think the core game concept is compelling. I don't know if there is an ammunition system, but it feels like I keep running out of balls to shoot. They start shooting again in a second or so, so I am unsure if this is an intended mechanic to prevent you from spamming shoot or if this is unintended. Also, when you die and click "Main Menu", the background music doubles over itself.