Usage:
Tetris is played by pouring out geometric building pieces of various forms from the box and carefully placing them back into the box; you can also put other patterns, and you can invent more playing techniques.
Product Description
Pour out all of the blocks from the disk, then use your head to reassemble them as quickly as possible. There can't be a single block remaining. Each time, keep track of the time to see if you've made any progress. You can also compete against other people. Whoever uses the least time, or who leaves the fewest blocks beyond the disk within the stipulated time, wins.
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