Lazy 8 Studios's Cogs -- recently shortlisted for the 2010 Independent Games Festival's Excellence in Design category -- is now available on iPhonefor $.99 (11 levels, with four additional 10-stage downloadable packs at $.99 each).

As with the PC version (download a free demo here), Cogs for iPhone challenges players with a series of 2D and 3D puzzles in which you slide tiles containing gears, pipes, balloons, chimes, wheels, and more to build different contraptions. The game features three modes: the standard Inventor Mode; Time Challenge mode, for solving puzzles in 30 seconds, and Move Challenge, for finding 10-move solutions.

The iPhone edition also includes several social gaming features such as challenges, achievements, leaderboards, and integration with social networks, made possible with the integration of Chillingo's Crystal platform. You can see more screenshots of Cogs at publisher Chillingo's site.