first, i dont like windows 8 an di dont want to use it, so i cant buy the game trough the app, and the windows/mac/linux link doesnt go anywhere, just 404 error, is this just me?
after i read about the anti-piratery measure i just tough “this is genious, i have to buy this game”
Our website is currently totally overloaded. Sorry about that.
You can get the DEMOs here:
https://s3.amazonaws.com/gdt-demos/GameDevTycoon+DEMO.exe (Windows)
and here
https://s3.amazonaws.com/gdt-demos/GameDevTycoon+DEMO.dmg (Mac)
You can buy the full game (for Win7 etc.) here:
http://sites.fastspring.com/greenheartgames/product/gamedevtycoon
that was a fast answer, im gonna play the demo now and buy the game after that 
thanks