Sometimes I want to download programs that are not proposed in the Software Center but only on the developer's website, like for example World of Goo Demo. But the website proposes only one .deb download link usable by Ubuntu.
Is it possible for me to use this file, even if I use an old version of Ubuntu or an architecture that still remains more or less exotic, as a 64-bit one? If yes, can I encounter any difficulties running the program, once installed?