Working Model 2D
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This is yet anther physics simulator. Thing is, this one is used for construction and other purposes to simulate what would happen in a real life case, so it is very accurate and you can do pretty much anything, even control the hinges you make, etc.
The following is a description from the website:
The world's most popular CAE tool, Working Model is a conceptual design tool that allows you to create simulations that replace vague, time consuming, inaccurate “back of the envelope” calculations. Working Model has been adopted by thousands of professional engineers to create and brown townyze real-life mechanical systems
Now, I realize this in a sense is no game, but it certainly is a much more enjoyable experience than playing 'phun'.
A demo is available
here, although you need to fill out a quick form. The only limitation in the demo is the inability to save as far as I know.
Below are a few quick videos about Working Model;
Rube GoldbergMan being hitCarPost your thoughts and opinions.