It's a nice game, but yeah, you're right, the demo doesn't really show me anything that seems very entertaining. I really liked Fallout, but this game is no Fallout. I think I remember playing a beta version of this game months ago, and there were a lot of interface, graphical and game balance problems. It seems to have improved for the most part, but it's still not great.
I've played Fallout, and I am still confused about what I was supposed to be doing. The first time I was a little lazy and didn't read much (I wanted to jump into the gameplay) but you really need to actively look for the tutorial. I would rather have the tutorial automatically come up in the center of the screen than have to hit the info box at random points. I think you ended up changing this from the beta version I played because people complained about tutorial interface problems? I say still go with an automatic tutorial, just give people the option to turn it off. I also didn't quite see how to equip weapons. I was surprised when the aliens escaped I didn't have a decent weapon so I just ran and let the guards take care of them. The then I guess the demo ended? A weird popup came up and when I clicked ok it launched IE (not my default browser ) and opened up your buy now page. When I played the game properly (the second time) I had some guns and ammo and had talked to the boss.
The interface, overall, is just bad imo. It uses a weird non-standard combination of left-clicking, right clicking and keyboard commands. There were a lot of little things that annoyed me. Like, in order to open that armoury door, I had to equip the key, cycle my items and then use the key. That's 3-4 steps to use a key... Most RPGs will automatically use keys for you if you click the locked door, I was really expecting that. I also didn't know how to reload at first, I don't think there was any mention that right click was reload. Why not automatically spend the APs to reload when you try to use a unloaded rifle? The combat targetting is also weird. It seems like you should be able to click on the actual character to attack, not just the circle underneath them. The path finding is not very good, but it's not horrible. It would also be very nice to have some kind of quest log and journal, and to have areas of interest marked on the minimap. These aren't revolutionary features, they're standard in most CRPGs.
There is also the issue of marketing. How have you marketed this game? It's basically a niche hardcore game for people that really like Fallout. You might want to try advertising on some of the Fallout fansites out there and getting involved in the communities. They might even be able to help you improve your game. The problem is, these people are just as likely to rip your game apart for being a bad Fallout clone as they are to embrace it, but I think if you're active in the community they will be excited about it.
The whole game reaks of Fallout, but not as good. There could be a great game here but the demo makes it hard to find. Improving the interface would go a long way toward making the game more playable.