Boost Block

The Boost block was a new block added in version 1.7.0.0+. It existed in the game before that, but it was just an arrow block, showing the direction to go. Now, if you jump into the block from the bottom, it makes you travel at a greatly increased speed. It is used in levels 41-50 (otherwise known as "The Greenbeans" The photo below is of an entire stage filled with boost blocks