I don't know what a chocolate and monkey milkshake would taste like, but it somehow sums up Not a Hero perfectly.
As a 'vertical slice', the kind of demo publishers and developers like to show off to press and consumers prior to release, I expect Not a Hero would be brilliant. Fast-paced, ultra violent non-stop action combine with vibrant pixel-art, a pumping soundtrack and a wise-cracking hero to create an underlying sense of cool. Storming through multi-storey buildings, sliding into bad dudes before executing them from close range, then smashing out through a window and into another as a thug is taken out before he has time to react; it's easy to like the experience developer Roll7 has created. But a few levels into the final game, I was starting to lose interest.