You should also be aware of some traps which can make you fail the level. Additional elements: glass, button and cross. Glass can withstand only half the mass of the block. You can not put a red block on it vertically. When you click on the button, additional platforms appear. When you click on the cross, these platforms disappear. If you do not know how to solve the task - it does not matter. "Solution" button is available without restriction. "Roll the block" has 3 categories. Each categorie has 1000 levels. There are total (3x1000) = 3000 tasks.