Woo hoo! I owe you for this Kev.
I suspect the mime type being returned for JAR files is incorrect.
Bugger, yes, good diagnosis. I only put the jnlp MIME type.
PS. Cool looking game, no idea what I was meant to do - but heh
Unfortunately FPS = 3 on my hardware (its crap hardware).
Cheers! You probably tried the Greenland map which runs super slow since it causes Windows to un-VRAM the images because too much bitmasking. The keys are WASD, E, R & mouse - you're meant to find the computer base & capture the flag. I'll put in a keys menu on & stick it in Games Showcase soon.
Thanks heaps for going to the trouble of proving it works on your website. I would have wasted hours searching google to find the trouble. And that webstart walk-through is really useful.