I really, really liked the idea behind this. Really loved the tentacle spike things that made you feel like an alien.
It was a little hard to enjoy the game though, mostly because of the respawn system. Glad to hear you're fixing this in a post jam version -- I know how it is to not have time to fix broken stuff. :P
Some thoughts on how you could make a post jam version really cool:
* Make the character move faster, and maybe add a sprint button that drains stamina. If you're revamping the combat, you could even play around with allowing multiple lunges before running out of stamina, but with the risk of not having enough stamina left to sprint to cover.
* The sneak mode is WAY too slow, I never used it. I don't think the game necessarily needs a sneak button though.
* The animation and game feel is a little off. It's a little too fluid and 'juicy.' It needs more 'crunch' to it, if that makes sense. It's hard to say how you do that - I thinks its about making the animation faster, and happen in bursts. Like after you lunge and impale a guy, it should have a moment of anticipation, and then the animation of ripping him apart should happen really fast. Play around with it, I guess.
Anyways, like I said, I really loved the idea behind this, and the basic design. It makes me want to try my hand at a 3d game next ludum dare :)