http://kerbalspaceprogram.com/
^^^clicky^^^

You can design, build and fly your own rocket or design whatever you want.

Nearly got to space on my first go, but run out a fuel,
.... Hell Fire! ..


Use your keyboard since nobody has a joy stick these days!

Some videos:
[youtube]BMStnYqL_mE[/youtube]
[youtube]kJM-j8PLW-c[/youtube]

You mean free demo?, the game itself is $23

I'm confused by it i designed my man but don't know what to do next

Figured it

Check out ORBITER, that's free and is a mix of aircraft and space simulator. Great community making loads of free add-ons.

http://orbit.medphys.ucl.ac.uk/