More bug fixing
Found a horrible bug which only affected people who downloaded the demo (everybody then!). Apparently Windows does not let you save files to the installed program folder, and unfortunately that's where I was saving a text file which holds the controls and the screen resolution information. The game didn't error when it tried to save the information, it just didn't save. So when you changed screen resolution, quit the game and restarted, it defaulted back to 1024x768.
This wasn't a problem when I was testing locally because I was the owner/administrator. Eventually figured out you can save it into the %appdata% folder, so I moved my ini files into this location. Hopefully this won't cause any problems for people with older OS's (eg XP, Vista etc.).
I also re-drew the inventory screen, looks much nicer now and fits in with the rest of the GUI.
Otherwise, feedback from the demo has been positive, thanks to everybody who has downloaded it and tried it!