A modern day Lemmings
Some enemies need to be avoided completely, whereas others may help you by riding on top of them. You will need to move walls, hit switches, reverse conveyor belts which often involves some degree of thought, especially when it comes to coin collecting, or collecting the 9 letters which spell Mini Mario which unlocks a mini game on completion.
The boss battle of each world sees DK navigating the top screen, and you have to fire MM's from a cannon which is controlled by rotating a wheel with the touch screen. Your 'ammo' is limited to the number of MMs you have rescued in that world, which is usually more than enough. A successful hit on DK does not deplete your 'ammo' but hitting the many obstacles and enemies scattered about; will.
The game was certainly enjoyable to play to completion, and I feel there is certainly more fun to be had to go back through the levels to increase my star rating.