Interlocking is a gorgeous, well made puzzle game that has what most puzzle games don't - a genuinely fresh idea, and a well realised mechanic.
I wouldn't say it's quite on the same level as Entanglement (which I just bought on the iPhone and legitimately can't stop playing) but whereas there was a certain element of luck to that game, Interlocking is based on pure logic. You have to think your way out every situation, and that makes it one of the most rewarding LunchTimeWasters of recent times.
It also has a really pretty soundtrack.
You're going to love it - this is one of my favourites.
Interlocked [Armor Games]