Easy, but very fun! The controls can get annoying, but not enough to make this a bad game
So, as "De Blob" you are able to absorb color points, and use them to paint buildings and such by touching them. you can jump around and attack enemies by stomping them. The levels are all timed, but i really can't see how you would possibly run out of time, because every little challenge you complete, you get like a minute more, and you already start off with 10 minutes usually. So you go around painting everything you see, and completing challenges, such as painting a set of buildings in certain colors, getting from one place to the other in a set amount of time (like races basically), destroying enemies, and bringing big landmarks back to color. The controls can get on your nerves.. you jump by thrusting the wii remote upward, and you can sort of do a wall jump, but wall jumping is usually very unresponsive. Besides that though, its great.
The game also has a free paint mode, where you can play levels and paint as much as you want, and a multiplayer mode, where you compete with another player in painting a certain level. It's really a very charming game, and worth a play, the overall look and feel is perfect, and soundtrack is always fun and energetic. Also the cutscenes are always hilarious.. for some reason the little INKT dudes remind me of the Rabbids from Rayman, just less evil haha. If you have a wii, give this one a go, you won't regret it.