the snake  follows your mouse or the analog stick of your joypad.
the balls move if you touch them with the snake or another ball.
the links are like balls, but they bond together if they touch each other.
the stones never move and do nothing else.
the magnets, unmovable themselves, attract everything that moves. the number of circles rotating around them indicates how many items may get captured in them.
the anchors never move, but bond together with links. the number of circles rotating around them indicates how many links may bond with them.

the aim of each level is to remove all anchors and magnets.

1. build dependencies:
   1. ImageMagick-tools