Thanks for your feedback! the Gun mechanic is like On/Off Switch that affect ball and flower. Please tell me what cofuses you and which stage did you have trouble with. I will fix that.
I think level 4 was where I got stuck. The ball would sometimes move toward me and sometimes it would move away from me, it was hard to tell where the ball was going to move when I shot it. The collision for the platforms was also a bit off, the ball would get stuck under them.