Arena (2003)

Taken from the publisher's website:

The cost of life is increasing every day, and you do not know what to do with the coins in your pockets? Then Arena is the game for you! All the matches in this particular Arena are fought using nothing but coins and some dexterity: the White player and the Black one, on their turn, grab one of the twenty coins available and drop it in the Arena, trying to cover their opponent's dots while protecting their owns. Each move can mess up the board, because you are not only challenging your friend, but also the force of gravity itself!

Arena can be downloaded from daVinciGames.com