Really liked this one, it was a cool idea. definitely develop this more! i think having both hostages and terrorists is a bit harsh, and also the arena is so dark during the bit you can look around in, that its really hard to actually see the guys, which i think is a bit of an extra handicap on top of the turn based nature which already makes it hard.
kind of reminds me of like superhot, and i think it could make a good fun arcade game if it was a little bit easier, and maybe make the graphics a bit more clear so stuff stands out, but yeah, i really liked it.