This game has a lot of potential, but the frustration factor is just too high. The behaviour of the figures are very random, so you'll sometimes have to wait for a very long period, until there's a chance to kill someone without being noticed. Then again, the panic trigger seems pretty random, since it went off a few times, even though I thought I catched a good spot. What also bugs me is that the cops will shoot you, even if there's no panic. And a very little mistake will lead to a restart. Doing a level over and over again is not hard, but very tedious - especially with that game play.
All in all this is a pretty good, refreshing game idea, but it seems too hard to realize it well, in just 48 hours.