Firemint, maker of the superb line-drawing game Flight Control, has released a demo version on iTunes. If you would like to see what the fuss is about or are a big fan of the movie Pushing Tin, it's there now.
The interesting thing about this retroactive sampler release is it's not a mere demo - it's what Firemint calls an "ad-supported free version". Which would suggest it's seen how much money Rovio is making from Android Angry Birds ad clicks and wants some of that. There's still some incentive to upgrade to the paid version, though - to remove the ads and access the full range of levels. It would like you to pay for the game twice, basically. [iTunes via Firemint]