Cool game! I died very quickly, partially because I lost Bill due to sending him in alone. Really like the atmosphere, and the top down perspective feels almost claustrophobic mixed with the somewhat slow camera.
Would be cool to have a multiple unit select and move like in a typical rts game. Might cause some hiccups with the character to character collision though.
I was able to get through all the way with one character just by running by all the infected, might want to speed them up a bit or put the characters in a situation where they have to fight.
In melee range sometimes my characters would stop shooting, was hard to tell if that was by design or because the enemies were no longer in their "view"