I found a bug where I lost a ball (my first one) during act IV and I coudn't launch it anymore. It never touches the ball as you can see in both pictures (and the ball stays in the air).
I don't know if it has something to do with it, but the ball I lost had the fire wheel around it.
Otherwise, I'm enjoying the game !!
Edit : Looks like pausing the game and going back at it solved the issue.
