Crazy Machines is a casual puzzle type of series of games for Windows, developed by FAKT Software from Germany. Most of its ideas originates from the old The Incredible Machine game series on DOS and Windows - using given mechanical components to construct a Rube Goldberg-style or W. Heath Robinson-style machine to solve a goal.

At first glance, you may not believe that this series of small flash games turns out to be full 3D with only 500 KB size for its original .SWF file (designed by A Small Game). In particular, it comes with my favorite two elements: ball + balance with the effects of gravity and collision based on physics.

Super Stacker is a series of physics and gravity based stacking style flash games made by The Game Homepage, comes with challenge and playability. Personally, I always think the balance is a kind of art! And this game provides players with the simplest and most effective way to try it out.

Crush the Castle is a physics and gravity based series of flash games developed by Armor Games - using the stone thrower (heavy catapult) to destroy the castles, which will make you think of the Angry Birds series (but with completely different style).

Contour mainly test your common sense on the balance of power in physics. You need to travel with the help of peaks and troughs to provide power, and finally reach the destination.