I have already mentioned World of Goo in two other posts, here and here, but I just beat the game and enjoyed it so much I felt it deserved its own post.
World of Goo was largely developed by only two people who run the indie development studio 2D Boy. It is an amazing accomlishment for two people. The goal of most of the levels is build structures to a pipe to get as many Goo balls in a pipe as quickly as you can and in as few moves as you can. The first levels are simple; but the game builds upon itself as it increases in difficulty.
The game is shorter than many games out there. The game took me roughly 8 hours to beat, including spending time messing around building a really tall tower in the World of Goo Corporation. In total there are about 47 different levels, each only taking a few minutes to complete. However, the longevity of the game is extended through "Obsessive Completion Distinction Criteria." Each one of these OCDs require you to collect a certain amount of goo balls or complete the level in a certain amount of moves. Many of these are very challenging (I have only completed 2 so far).
Graphically each level is simple and stunning at the same time. The music is very entertaining and fits perfectly with each level of the game. This was made easier since the design, story, art and music were all done by the same person. There isn't really a cohesive story behind the game, but there seems to be a lot of symolism going on in the game. Plenty of stuff to phychoanalyze if you like doing that while you play video games.
This is a game that everyone can enjoy. For just $15 this game is a steal. Buy some Wii points and enjoy this game.
WiiWare should get more recognition from everyone because there are a number of games on WiiWare that are superior to many retail games. Not to mention they provide you great entertainment for a fraction of the price of many retail releases. In October alone two of the most critically acclaimed games for the Wii were on WiiWare: 
