COLOR LINK! -brain teaser comes from Yuji Kurita. It's a 'stick 'em' puzzle. The object is to slide the squares around until everything clumps together.
However, there is a move-count limit for each level.
What's Particularly Good
On some levels, the blocks come in 2 colors, but must still be merged into one group. Tap on a block once and it changes color. This counts as a move. This is a new feature in 'Stick 'em' puzzles.
These are seriously good puzzles.
There are 45 levels, which is perfect! There is an option for users to make their own levels. At the moment, I'm on level 20.
Other Very Good Puzzles that have a sticky element (not quite the same though):
Denki Blocks I believe this was the original puzzle app that introduced this concept.
Tile'M All This version is crazy hard.
Blockoban - a must haveMove on Green
Blocky XMAS from the prolific Bart Bonte
Push Blox from Andrew Duff