Each player has five mice and an unlimited number of walls outside the board.
First click the board to allow Zillions to randomly drop ten cheeses. Then the two players drop one mouse and one wall per round for the first five rounds. From then on in each round each player moves his mouse and then drops a wall.

A mouse can eat a cheese. The number of cheeses eaten is indicated at the border.
For each cheese eaten one of the player´s mice can gnaw through a wall.
A mouse can also kill another mouse, but only after it has moved at least once.

You win the game when you have stalemated your opponent.

Variants 2,...,6: more mice and cheeses.
 
 
More freeware as well as real puzzles and games at my homepage http://karl.kiwi.gen.nz.