TrainCraft is a moderately amusing arcade-like game for Mac OS X 10.6.6 and higher. Think of it as a railroad version of Pac-Man.
In the game, you control a train that drives around a screen. Your goal is to collect coins while avoiding the energy train that tries to collide with you. Tap and drag your finger to switch turn-outs to change your train's direction as you try to gather all the on-screen coins and proceed to the next level.
You can also collect "vagons" to multiple your score. Your train's speed can also vary as you use the "speed increase" and "speed decrease" buttons.
The gameplay in TrainCraft is simple and has a nice retro feel with colorful, old-school arcade graphics to match. Plus, you can select from a variety of screen resolution settings (from 640 x 480 to 1344 x 1008) to best accommodate the Mac hardware you're using.
Still, the gameplay gets a bit monotonous after a while. And there are some spelling errors in the on-screen instructions ("increaces your speed" rather than "increases your speed") and some strange phrasing ("slowers the game") that make the game presentation seem amateurish. On the other hand, it's inexpensive and is an entertaining game for a few minutes of distraction.
TrainCraft is available at the Mac App Store for US$3.99.