Well this is definitely a high score game. I got very much sucked in trying to beat my high score and manage to survive as the combo'd hat guy for long enough to get a crazy combo. Though when I discovered auto fire, I sorta went on a murder spree...
The game has a ton of little juice added everywhere tho I've gotta say, ignoring the repetitive sounds (I'm surprised you didn't just randomize the pitch?) it has a lot of really nice screenshake and explosions etc..
Though I would say the explosions on the charging enemies were a lot bigger than the actual AoE radius, which looks cool but kinda threw me off when I was trying to avoid them a lot. There were so many situations where I coulda sworn I got hit by one.