This game is free, with no advertising and non intrusive.

Game for 2 players- You can play against Android.
The game starts with a stack of coins,
Two players play alternately, removing 1 or more coins.
At each play, the player may remove up twice the coins removed by the previous player.
In the first move, the player can remove all the coins less 1.

Wins the player who removes the last coin!