Trapped.
With a little skill and practice you are quickly able to trap the fireball things and once you acquire that talent the game becomes simply a matter of waiting for the heads to grow without any danger until you can repeat the process. Each level is exactly the same apart from the amount of time I had to wait before trapping the fire balls became longer as their number incresed. The game can cure boredom for maybe a few minutes but only when muted, the music is a fair attempt to set a mood for the game but instead is just annoying - A two second piece of music on a constant loop is never a good idea.