In an interesting combination of money recognition and addition, players are asked to click on coins that would amount to the total that is displayed on the upper-left side of the screen until the given time has ended and the player moves on to the next level.
However, there is a catch. As time progresses, coins continually drop at random positions in a steady pace from the top of the screen. If even just one stack of coins become high enough to reach the red-colored level at the top, the game ends. The only way to prevent this from happening is to be fast enough to choose the correct coins so that those above them can drop down. The rate in which the coins fall depends on the player’s level; the higher the level, the faster they come.
Though there is no score, teachers can convert this game into a simple challenge where the student(s) with the highest level reached wins the game. Alternatively, if possible, one can open two instances of the game and ask two groups to play at the same time; the group that lasts longer wins the game.