Some of the great games in recent history have taken two genres and combined them into one cohesive experience. Henry Hatsworth spliced platforming with puzzle gameplay, Might and Magic: Clash of Heroes combined puzzles with a role-playing game, and Beat Hazard mashed up rhythm and twin-stick shooting. Not only did they take two genres and put them together into one game, but they all did it well.
Rush Bros. attempts something similar by taking a platformer, focusing it on racing, and sprinkling in some rhythm-based game elements to help spice things up. Unfortunately for this dish, the spice is sparse and the resulting experience is far too bland to be engaging.