Defend Your Castle significantly for its May 12th Wii Ware release, swapping out the, well, "Flash game" look of the original for a lovely "made of junk" theme. The castle has become a set of construction-paper rectangles decorated with paper flags on toothpick poles, and the enemy invaders have become doodles with button heads. Our absolute favorite detail is the user interface: the health bar is now made of fabric scraps.
We hate to make the comparison to a not-particularly-awesome game, but this style was used to excellent effect in the Napoleon Dynamite DS game. The art was by far the best thing about that game, whereas this has already been proven to be a pretty good game.