To insert the 3D objects into the box, simply tap. The same objects will be gathered in threes.
You succeed once you've collected every object.
You fail if there are 7 items on the boxes!
Be careful when using the timer; you should tap quickly to match objects.
After finishing a level, you'll discover new items to pair.
The game has a good amount of difficult, well-designed levels that will exercise your memory and train your brain. It is the best way for you to kill time!