I liked the game until the part with enormous wall climbing which really just made me frustrating and unfortunately it also negatively influenced my rating of this game.
I really like this kind of games but the drawbacks are that its extremely laggy sometimes i can see straight away where to select then i click on those places and wait for a minute... the other thing is that there's no way to select more challenging puzzles. For those who have experience in it can be quite boring to solve easy ones..
Once I played and got stuck with sniper rifle being unable to change to any other weapon except throwing grenade and that just killed me because there was some bugs on my face and I could't kill them since I need knife but I can't change to it
Try clearing your browsers cache maybe? Music files were shifted onto a new Cloud server as I was getting massive bandwidth bills :(