Developer: inXile Entertainment
Price: $1.99 Download on the App Store
inXile Entertainment's Fantastic Contraption is the online game reborn on the iPhone. It's based on the same principles as Pangea Software's popular Engimo, RealArcade's Tiki Towers and Hudson's Crayon Physcics Deluxe and other physics-based games that involve building Rube Goldberg-like machines that transport objects from point A to G to C and Z.
If you build it, wheels spin, gears turn, water flows and who know what else comes and goes.
Fantastic Contraption plays well — that is, the dev makes it easy for you to to assemble parts and the machines operate according to the laws of physics (not that I'm Issac Newton). One nice feature is that when you connect parts, you can zoom in and out and get a magnified view of what you're doing. That makes it much easier to connect the dots (and I do mean the dots on the wheels and other parts).
Fantastic Contraption has a built-in editor so you can build your own challenges and either play them or upload them to the company's Web site. While you're there, you can download contraptions others have built.
The game's graphics are a bit on the crude side compared to similar games of this type. In the plus column, Fantastic Contraption at an introductory price of $2.99, which is less than many others of this type, which are in the neighborhood of $4.99.