It works now! Thanks for your help!
I am using an Ubuntu-like distribution called kxstudio (http://kxstudio.linuxaudio.org/) and my PC is 64 bit.
I tried running this on Linux, however, it gave me this error:
./defenseevolution: error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory
Installing both libnss3 and libnss3-dev didn't help.