The game consists in running around a huge maze, hoping to find a couple items to make your life easier (especially dynamite) and potentially fighting a few guards who caught you. I was expecting something more stealth (like, with guards closing on you when caught, GTA-like), prisoners to interact with, and with a different soundtrack - which in my opinion doesn't fit that well.
Also, to finish the game, you just have to jump into the void. When I first saw that, I thought I just broke the game, but apparently that's what it was supposed to happen. It looks to me that this was more a challenge for the author themselves to create a procedural map than a well thought game experience