Happy Lines is a puzzle game where the object is to make as many lines of smiley faces as you can.
The gameplay in Happy Lines involves moving colored balls (with faces) to make lines of five or more balls of the same color. You simply tap on a ball to select it, then move it to the square you desire. Be careful, because balls can only be moved if there is a clear path between its starting point and destination. It might sound complicated but it's actually not.
You can play Happy Lines in either progressive mode, where the 40 levels get increasingly difficult, or in arcade mode, where you can choose your level. You can choose to play Happy Lines with or without a time limit, depending on how difficult you want to make it for yourself.
Happy Lines challenging fun for a while, and the graphics are certainly cute and colorful. However, it does tend to get a bit repetitive.
If you're a fan of puzzle games like Columns or Tetris, then it might be worth taking a look at Happy Lines.