I’ve been trying to download the game through multiple browsers, using proxies, even by changing things around in the URL but every time I click on the download link for 0.5 I get sent to http://en.cataclysmdda.com/Downloads/CataDDA0.5.zip which for me is a white page with the writing ‘The Page You Are Looking For Doesn’t Exist’ I really want to play the game so any help would be greatly appreciated.
Yeah that sounds like a bit of a website problem. 
Hopefully GlyphGryph can get a fix up soon. Until then maybe somebody else would be kind enough to post a download link for the normal version, or you could maybe try out the latest nightly build which is basically just as stable as the normal version.
Thanks for the download, looks like it should work 