Reminiscent of the original HATIC campaign. Also reminded me of how much I hate the slippery terrain, especially when you zoom forward when going from crawling to standing.  

I have to say, I agree with jeb. very neatly done, looks much like the campaigns which is good. nothing too special, quite basic, but very good basic. the gem area utilizes the slippery terrain in water much, makes it MUCh harder. I have to say, this is going to be massive. MASSIVE.

So I finally decided to get around to playing one of these.

My biggest thought after playing one level: Holy crap that Ice is annoying what were they thinking? Multiple deaths caused by Armin slipping into water, Hannah into spikes, ect. When/if I make one of these, I'll have to make sure to use player friendly surfaces like metal crates and platforms, because that is REALLY annoying.

That said this was a pretty good cave. Like they said, designed a lot like the main levels were, which I think is a really good thing, because that generally means you took the player into consideration and didn't go overboard with making crazy traps. I'm very much for that.