Algodoo

You want something more complicated link0007?
Here you go:

http://www.phunland.com/phunbox/details.php?id=19446

exactly what doesn't work?

Call me stupid, but what exactly does this do?

has been done already, search for jetpack

Hmm. i don't know why it doesn't work for some.. I'd understand if it didn't for anybody, but this is weird..

heh ok, ill make one
keep an eye on these comments, ill tell you when its done