Hey! Here's my feedback: Playing this game was pretty interesting and absolutely fun experience. Some of tricky situations really reminded me Spelunky where some different consequences could bring you to death, which in this case was humans death. Like I was holding one of the passengers leg moving through some doors and then I saw this little octopus jumping to me, this was really surprising and unpredictable so I tried to throw some stuff around to kill him and then when I was at low HP I just threw this explosive barrel too close to my human and... well yea that was something I really remembered).
Visuals are also on a very good point, since rendering 3D environment in pixels gives something from 2D old nice feeling mixed with some awesome lighting. Which is really neat.
Controls are a bit tricky, but even I understand that's some sort of main mechanics of this game, sometimes they aren't working right, for instance: Releasing mouse button doesn't throw some Items like it did before, grab throw obstacles could be too hard sometimes, and finally there is no indicator on mouse crosshair that could show you when you CAN grab and when you can't, this is something I found In my game (which is just a bit similar to yours) when I was making it, you could find it on my page <Bob the blob>.
Anyway, I enjoyed a lot in general and I really hope you'll finish this game releasing it on Steam someday and I'm pretty sure if this will happen, I'll buy it). Good luck!