Go as fast as you can! They are stronger than you think... They will have to work together to climb very high... a real Tower of Goo! Some of them felt they had done something like this a long long time ago... but things were more experimental back then.
Tower of Goo is a level in the video game World of Goo. It is the tenth level of Chapter 1. In this level, the player must use Black Goo to build a tower to the exit pipe. This level is similar in basic design to Going Up but the exit pipe is placed much higher, you have more Goos, and you must collect more Goos to complete the level or get OCD.
The sign on this level quotes "They felt like they had done something like this before. But things were more experimental back then". This is a reference to the game's prototype, Tower of Goo. The name is also a reference to the prototype as well.