The goal of the game is to clear all the coloured rings from the ground. When 3 rings of the same colour are connected, they explode. All the rings which are not connected anymore to a black bubble also explode.

You control with the mouse a set of rings connected to the ground, symbolized by the black bubbles. Very Important : When you destroy all the rings of a given colour, this colour doesn't appear anymore unless a remaining floating ring of this colour get stuck on the ground rings.
Each time a floating ring is getting out of the board, the left and right walls are getting closer. The game is over when you don't have any space left to move the gruound rings.
Good luck!