Line Up Free is a free, fun color matching game from LabPixies, the creator of Flood-It!  It’s one of the Top 25 Free Apps from the time it’s launched.

Here is how you can play it. You will have to click on blocks of  3 or more of the same color, as quickly as you can, before they overflow the board. The more blocks you remove at one click, the higher the score you get.

You will get 6 points for every 3 blocks, double up for 5 or more and triple your score for 10 or more as bonus. But remember, you only have 100 taps for each speed cycle. Speed cycle and tap limit go up as you move ahead. Also random beam is available to destroy one line and one column to help you out.
It is compatible with iPhone and iPod touch running on iPhone OS 2.2 or later.

iTunes Link To Download

The paid version, Line Up PRO is available for $0.99 with following features.

• Speed cycles and tap limit for a more challenging experience.
• Random laser beam to destroy one line and one column
• Pause and restart the game
• Continue from where you left the game on exit or phone call
• 4 cool color schemes
• Global top scores list

LabPixies, the leading developer in creating coolest gadgets on the web and mobile, has few other games in app store. You might want to check it out.
Line Up PRO
Flood-It! (Free)
Flood-It! PRO (Paid $0.99)
Meal Calc Lite (Free)
Meal Calc (Paid $1.99)