The tightest game design i have seen in a long long time, manages to create an aura of tension, suspense and on the fly strategy while conveying this wonderful sense of motion and killing that got me smiling stupidly hard as an approach came together perfectly.
The total lack of downtime between death and respawn keeps the pace relentless as well as the drive for score and unlockables, the fragility of both you and enemies makes the game feel fair while giving you a good challenge every stage, its better to think of the game as a rougelike puzzle/strategy game than simple action beat em up.
Soundtrack compliments everything and combined with the visuals your first few hours you can find it very hypnotic and disturbing as well which suited the overall chaotic and nauseous tone of racing back to your car when the level is complete.
Ive found it to be amazingly replayable with a lot of masks giving cool new options or mechanical differences.
Story is fairly good too and its fun to see the devs fuck with completionist attitudes by making the secret ending and the rewards you get for it entirely underwhelming and at odds with the normal formula of "Oh well heres the BETTER ending". Theres a definate tone of mockery there where the games normal ending while funny and in line with the rest of the game is contrasted with the overly serious but still very strange secret ending.
Impossible to regret buying this.