Oh man, I love these games and I've got to L7 but there seems to be no rules.. there seems to be no consistency in the early levels in what determines whether a monster can see you or not - sometimes one tree is enough to block view, sometimes they can see thru 2 trees.. In the later levels swords can do different things in different places - I discovered that in L5 but it didn't help in the solution (which took me a ridiculous amount of time to get to). I then screamed thru L6 without even trying but L7 has got me stumped (pun intended! ha ha). Is the secret that there are (almost) no rules, it's all just random and you just gotta keep flailing away until you find the key to each level?!
EDIT: Ah! I've finally figured out THE SECRET that hadn't made sense when someone had hinted it earlier on. Chop chop..
EDIT 2: A level select (once completed) would be great - to be able to go back and replay
EDIT 3: L8 was silly easy after all that headscratching
Awesome game series - thanks for all your work keeping me entertained while I have no work!