I've updated the demo and it's now available at World of Sam. http://www.worldofsam.org/node/684
It now has 20 levels and hopefully it's a bit easier! That said, a couple of the levels are right mingers in the hard game mode! There's one bug I know about where the cpu lets you win but it only crops up in one level and only after a very specific chain of events. I'll fix this as soon as I can! Rob.
