Great concept, still very basic in it's gameplay and the audio visuals could use some work. The gameplay is pretty difficult with the sword having a much smaller range than the enemies' guns, but as long as I'm not in a group of them it ends up working out alright. Not sure what the heartbeat mechanic was for other than to follow the jam's theme, so maybe put more thought into what something is contributing towards player fun next time you put in a gimmick like that.
Also please change the text for the UI, it's borderline unreadable and not good for UI