aa

aa is a simple arcade game. A circle with several pins stuck into it is rotating in the middle of the screen. The player must successfully stick a given number of additional pins into the circle, by tapping at the right time. The heads of the player's pins mustn't touch the heads of any pins already in place. Successfully putting in all the pins moves the player to the next level, but any mistake causes the level to be restarted.

The difficulty increases on each level: the circle has more pins stuck into it and is rotating faster, and the number of pins that must be successfully placed is increased.