TUAW's Daily App: Train Conductor
Train Conductor is a sort of line-drawing game, although it's not quite as open as most games of that ilk. The idea is that you've got four rails of trains running at each other, and as the conductor, it's your job to make sure nobody hits anybody else. You can stop and start trains when you want, and you can just draw tracks across from one set of rails to the other. It sounds simple, and of course, it is when you start. But as with most puzzlers like this, things get crazy quick, and eventually you're shooting trains back and forth, desperately trying to keep them coming without any crashes.
The game's a lot of fun, and it's free on the App Store right now. In fact, there's even a sequel out with more locations, train types, and tons of additional features (including some coming down the update pike soon). The sequel's just 99 cents, and man, a buck is a small price to pay for all the game that's squeezed into these two apps.
