The game really excels at what it's trying to achieve - frantic gameplay that keeps you on your toes. You always have to be ready to dodge and be aware of the positions of the saws at all times. Although there isn't much to look at, this actually works in the game's favour as you are not distracted by unnecessary elements.
Personally, I would switch the constant refill of enemies for a wave based system to give some breathing space in the action, or at least add an option to pause the game.
I really like it overall though! Well done!