I got to 9 saved before I stopped playing. I like the idea of loading up and running for the gates, but there are a few things that I wish you had time to adjust. ;)
The deaths are completely random, as you mention. A lot of times, the player gets stuck in a place where they are unable to do anything about 2 or 3 people jumping at nearly the same time, and you can't do anything but watch. A little more logic on their spawning would have been super helpful.
Also, was it a design decision to disallow people to hold down/up and left/right at the same time? I was often stuck turning into a building too early, and thought it might have been nice to slowly grind up the wall even if I cant turn left/right directly yet. Hopefully you get what I mean. :P
I apparently missed a few falling prisoners, but my truck felt like it was perfectly lined up. It seemed to happen with the high falling prisoners the most. A bit frustrating, especially when I miss another prisoner because I chose this one.
Either way, it was a fun game to play on the train home, and great for a first LD. :)