Entertaining to listen to, but God, these guys are playing the game totally wrong. Level should take you like... a minute to get through. Think Super Meat Boy. You just rock your shit, die, and keep on going like nothing happened. You don't stand around waiting for shit to happen 90% of the time, barring special circumstances. There's no reason for them to be waiting a lot of the time, and you can melee a room with 3 dudes with guns most of the time once you know what you're doing. So it's really kind of a bad QL as it doesn't reflect the proper pace of the game like... at all. I guess you could play it this way, but your scores will be complete shit. My goal in almost every level was to kill every single dude as part of the same combo, if that gives you any idea of how fast this thing can really be played. He seems to kinda figure it out at the very end that moving quicker is better. I think caution honestly will kill you more than going balls out with this one.
EDIT - Yay, patch! The flexibility bug has been fixed, and Steam version is updated, GOG should be up for download in the morning.
Also, turns out all the music in the game is readily available in .OGGs in the game directory. I put together my own soundtrack since the one for sale is only 10 tracks (full is 20ish). Such great music. The game is worth it for that alone.