Sorry about that. Thanks a lot anyways!

I have a mac, if that changes anything?

What do you mean? (sorry)
I only have one .jar file, from the main page...
Thanks

Hi! This game looks really cool, but I am having a problem playing. I have downloaded the demo/free version from the front page, but every time I try to open it a window pops up for half a second, then vanishes and the app crashes.
Any help would be awesome!