Tetris Worlds

Hints:
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Submitted by: RM

Easy ranks:
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In story mode you can only gain one rank per game. Once you go up one rank 
(usually after reaching the goal within two minutes for a second time) just 
top out, watch the scenery change, and start again to gain another rank. 

Indefinite flips:
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When a piece reaches the bottom, you can turn it indefinitely, giving you 
more time to think.