Hi Clenched, That's great feedback, many thanks. Suffice to say I thinkt he difficulty level on the demo is too high, that's fine, if you compare with the other games in the series they start off much gentler. The full game will be pitched better. I have half a mind to release a new demo soon with some tweaks to make it abit more accessible.
As for the crashes, I've seen some of those bugs myself, I wasnt sure if it was unique to my own set up or a more generic problem, so it is useful to know you were affected. I need to go through it all with a fine tooth comb to understand and iron out any of the bugs it seems.