As you progress to higher levels, you'll encounter a variety of special blocks and obstacles, each with unique rules. Here’s how they work:

• One-Way Arrows: Some blocks have arrows printed on them. These blocks can only be moved in the direction the arrows are pointing.

• Double-Layer Blocks: These blocks are stacked with two different colors. You must clear the top layer first by sliding it into its matching shredder. Only then does the bottom layer become active and ready to be moved.

• Key & Lock Blocks: You may see some blocks that are chained and locked. To release them, you must first find the matching Key Block on the board and slide it into its shredder. Once the key is used, the corresponding Lock Block will become movable.

• White Number Blocks: These special blocks start the level locked and display a number. The block will only become movable after you have destroyed that many other blocks on the board.

• Closed Gates: These gates, which look like screw-covered cages, will block certain exits. To open them, you must find and clear all the "screwdriver zones" in the level.

• Rainbow Blocks: These are wildcard blocks! They can be destroyed by sliding them into a shredder of any color.

• Iron Blocks: Iron Blocks are unmovable, unbreakable obstacles. You cannot destroy them, so you'll have to find a way to navigate your other blocks around them.

• Apple Blockers: These blocks have apples on them and can only be cleared by sliding them into a special shredder that also has an apple icon.