Rect head and block head are blocks that can be stacked on top of each other and can smash goo structures if needed. These blocks can be built upward to support your goo structures. They’re vulnerable to hazards. These blocks can stop the momentum of goo; for example, if goo is shooting out of something, use a block head block to stop it.
Mobile Gaming eGuide - Tips, Tricks, and Strategies for Today's Hottest Mobile Games World of Goo