The rules, complete with example images, can be seen here:
CLICK.
In summary, your goal is to unite your pieces into a single group (including a "group" of one piece). Each turn, you may take
one of three actions:
* Move a piece any number of spaces in any direction (you can move other other pieces of any color, but not over walls)
* Detonate a piece (a circle removes itself and all of its neighbors, and an asterisk removes itself and all pieces in any direction you choose; a wall blocks either kind of detonation)
* Add two walls anywhere to the board
The first player to have all of his pieces in a single group wins.
The colors will move in the following order: purple, orange, green. After three players have joined, I will randomly determine which of my opponents chooses a color first, and which one chooses a color second. Then we'll take turns doing stuff until the game is over.