I liked the game; the visuals and music are very good, but the gameplay has some issues, which I'll try to describe:
First, it's unclear why they implemented the lives system. In Hotline Miami, everyone died in one hit, both you and your opponent. That's fine, but the melee enemies are incredibly strong; they drain your entire life in an instant, which completely negates the multiple lives system. It's unclear why it's needed.
Second, the level itself is unbalanced. I understand it's hard to do within three days, but cramming several people with shotguns into one room is a lot. A lot. While the strategy of strafes and shots from around corners works (which is great!), it doesn't help, given the limited ammo.
Good work, thanks for this game!