Linefall

• Tap a line and it slides off the cube along its arrow.
• Check the lane. A line can only leave when nothing sits in the lane ahead of its arrow. A wrong tap costs a heart.
• Drag to turn the cube. Pinch to zoom.

On the cube

• Pin. Red pins are fixed to the cube. A line can never slide through one, so arrows aimed at a pin are stuck for good.
• Padlock. This line stays put until the line with the matching key has left the cube. Both carry the same colour and small symbol.
• Key. Clear this line to open the padlock with the same colour and symbol.
• Chain. Linked lines leave together. Tap either one, and both need a clear path at the same time.
• Bomb. Clear the red bomb line before its counter hits zero. Every move counts down, so work on the lines in its way first.
• Shapes. Some puzzles are built from blocks. Lines bend into inside corners, and every arrow still leaves off an outside edge. The level picker shows their outline.

Buttons

• Hearts. Three on every level on Normal, two on Hard, one on Super hard. Run out and you try the level again.
• Restart. Starts the level again. Once you have cleared a line or used a hint, it asks first.
• Sound. Turns the sound on or off.
• Levels. Pick any open level, or visit your sticker book.

Stars and stickers

• Stars. Three for a clear with no bumps, two for one bump, one for more. Three stars is a flawless clear on any difficulty. A clear that used a hint counts for one star and no flame.
• ?What’s inside? Every level hides an object. Each line that leaves peels away the tiles it covered. Once you’ve found it, its sticker shows in the level picker.
• Stickers. Peel the object’s sticker off the result card to put it in your sticker book. A flawless clear earns a shiny one.

Coins

Level picker

• 10Boss. Every tenth level is a boss: a bigger cube in deeper colours.
• Locked. Clear the level before it to open it.
• Difficulty. Pick Normal, Hard or Super hard on the title card or in the level picker. A level cleared on Hard gets a flame, on Super hard two.