So far, throughout this entire review I've mentioned the laws of physics, especially those of gravity as being the founding blocks for this game; I just hope I can find the right words so I can do this game justice.

Immediately after I started playing the game, the first thought that came to mind was the Leaning Tower of Pisa. In many of the levels, you have to construct upward structures made of goo to the point that your structure reach the entrance to the pipe where the goo balls need to reach. In World of Goo, going up isn't necessarily easy; gravity is a bitch.

Depending on the level, only certain types of goo balls can pass through a certain pipe. For example, the red goo balls need to be connecting to a red pipe. But not all levels require you to build upwards. In some of the levels you have to go sideways, on some you have to descend and on others, you even have to fly. That's right; flying goo balls! That's where I essentially had the most trouble with the game. For the longest time I didn't realize that the red circles presented in some of the maps were not just decorations but actual balloons that can be hooked up to the goo. The more goo you have hooked together, the more balloons will take to lift your pile of goo.

But regardless of where your goo needs to go (up, down, left or right) one thing remains constant for every level: your goo must stay united. Goo balls are linked to one another and even the unused pieces travel up and down the goo skeleton structure. Since there are several types of goo, there are several different connections. For example, the black goo balls are the heaviest goo balls in the game and they are linked by strong connections (the shorter the distance between the balls the stronger the bond). Green goo balls actually repel each other therefore the closer the connection the stronger the repelling force between the balls. The giant goo balls have it the worst since you have to bust the balls up and turn them into smaller balls before they can travel up (or down) a pipe. How you build is where your creativity and the intellect of this game truly flourish. There is no wrong or right way to build. However, analyzing the environment, the quality of your goo balls, as well as basic laws of physics (especially gravity) determines your level of success or failure. As you complete a level, all extra goo balls released will go towards your personal goo ball collection (where you can play by yourself with your balls or where you can play with them online). Building is the objective and how you go about unleashes the challenge in the game as well as your creativity. If you're a student, you should turn World of Goo into your science project; it is physics at its best. Well, maybe not physics at its best, but at its funesst anyhow. Yes, I know funesst is not a word but it should be.