How to play: 

Try to arrange four hearts of one colour next to each other.
When there are four hearts of one colour matched, they disappear.
The aim of the game is to remove all hearts from the board. 
New hearts appear at the sides. When you click onto a heart at the side, it is moved into the board. When the edge of the board is full with hearts, you cannot move a new heart into it. 
The preview (in the first and second version) shows you which colour comes up next. Below the board you find a table showing your score. The row "moves" shows you how many moves you can make without matching four hearts before penalty hearts appear on the board. When "moves" is down to zero, as many penalty hearts as shown in the row "penalty" appear on the board. The number of penalty hearts increases when you manage to remove all hearts of one colour completely from the board. 
In version one all appearing hearts are in the same colour.
In version two all hearts of one side appear in the same colour.
In version three different hearts appear on all sides. 
When you start a new game, version one starts automatically.