Okay, after finishing it I like what I see. The gameplay changes up a little which is welcome. The bounty idea is nice too. In terms of level feedback I feel like the second alarm boss tends to get in your way too much because of the conveyors, while I never even saw the third boss due to keycard/exit placements. There also seems to be a bug with the cloak suit and the spider queen enemy I forget the name of. Walked into it while being cloaked, and I managed to trigger it about a dozen times repeatedly.
But as I said before, it feels like a great improvement to the gameplay formula, keep at it!