Thanks for playing it so far through! I have to apologize for these really bad areas. I had to do all the level design in about an hour, and didn't have any time to playtest it because of the 48-hour jam deadline, so there are a TON of issues. The truth is that I'm not happy with how this game plays. Like you said, enemies don't indicate their presence to the player well enough, and can spot you from much too far away, so you get sniped by guys you aren't even aware of, which is not fun... Also the game world has too many empty boring zones
I've been working fulltime on a total redo of this concept, called 'In The Crags'. It has the same visual style and basic structure, but the gameplay and level design have been redone from scratch. Enemies aren't stationary anymore; they're intelligent and will try to chase you if they spot you. Also you can now jump, crawl, and read the minds of NPCs and enemies :)